16.  CONCESSION:  The Kartway will have a concession stand during all full race events. CARRY-INS ARE NOT ALLOWED. Anyone wearing a pit pass will not be allowed to purchase/consume alcohol. NOTE: The Kartway will supply ample garbage containers, please use these containers, each competitor will be responsible for the condition of their pit stall area during and after each event. Please do not make the kartway clean up your mess!

17.  COMPETENT/ABILITY:  The Kartway reserves the right to deny entry to the pit area or into competition any person they feel may not be mentally competent or physically able to meet minimum safety requirements.

18.  PARTICIPANTS:  All persons must be officially signed in before entering the pit/track area. Any person not officially signed in, or any person caught entering restricted areas without proper pass or any person caught exchanging passes will lose pit pass privileges for the remainder of that calendar year.

19.  PARTICIPANT INSURANCE:  All persons entering the pit area or any designated restricted areas must comply with all insurance regulations and registration procedures. Failure to do so or entrance by fraud, deceit, or passage into the area will subject to immediate removal from the restricted area and possible suspension of membership. Person receiving an injury, (no matter the severity) must report that injury immediately to a Kartway official. Any injury not reported by finish of that particular racing event, will cause that claim to be void.

20.  MINORS:  It is mandatory for persons under the age 18 to have properly executed and submitted to Meadowview Kartway for file, a Minor Release Form and other prescribed insurance documentation prior to competing in a Meadowview Kartway event.

21.  MINOR DRIVERS:  The minimum age for competition is 5 yrs. Minors under the age of 5 yrs. will not be allowed to operate any kart on the kartway property. Note: Minor drivers must satisfactorily demonstrate driving capability to officials when requested to do so.

22.  ELIGIBILITY:  A drivers actual age as of January 1st of that year shall establish their "group age" for that entire calendar year.  If their birthday occurs after June 30, they may move up on or after their birthday and complete the competition year in classes with the next higher age requirement. If the competitor does move up an age group, he may not return to the younger group.   Once you change classes you start, your new class with 0 Points.

23.  KART REGISTRATION:  Any kart entering competition for the first time must be safety inspected before being approved for competition. The kart frame/engine/driver is the official entry in an event. Once an official lap through scoring had been made, that kart frame/engine/driver cannot be changed without the permission of the Race Director.

24.  NOVICES:  A driver with less than three races of experience should place an "X" on a brightly colored (preferably orange) number panel on the rear of the kart and novice drivers will start at the rear for 3 race events in all races.

25.  CONDUCT:  All drivers shall conduct themselves in an orderly manner. Physical violence, verbal abuse or threats of any individual; official, participant, spectator, etc.., Will subject the offender to immediate ejection, and possible suspension.

26.  PIT CREW MEMBERS:  Drivers are responsible for the control and actions of their pit crew members. Unacceptable actions of crew members may subject driver to penalty or disqualification.

27.  MEMBERS/MEMBERSHIP:  All members are included in reduced rates for regular races and practices, receive mailings for special events and meetings, have the privilege to vote. It is the responsibility of the driver to present their membership card for the purpose of registering.  Any member not presenting their membership card will be charged full price.  Only active members will receive payouts and end of year championship points. To be considered active must run at least 60% of the scheduled races.

28.  PROHIBITED SUBSTANCES:  All participants entering the restricted areas shall be sober and not under the influence of any substance that may impair their ability to participate in a safe and orderly manner. The Kartway reserves the right to deny entry into competition or the pit area any person they feel may be under the influence of drugs or alcohol. NOTE: Drivers will be held responsible for the actions of their crew members and family members. If, in the judgment of the officials in charge, any individual under the influence may be ejected from the restricted area, and driver may be disqualified or suspended from events.

29.  MANDATORY DRIVERS MEETINGS:  In all divisions, it is mandatory for ALL drivers to attend. Failure to attend mandatory driver's meeting will waive the competitors right of protest for that day.

30.  DRIVER APPAREL:  Drivers are required to wear jackets of leather, vinyl or abrasion resistant nylon or equivalent and full-length pants to prevent of minimize abrasions. Shoe, socks, and gloves are mandatory.
EYE PROTECTION: Eye protection is mandatory, a full visor (clear view) integral with helmet. Dark tinted shields not allowed during night races.
NECK BRACE: Collar-type, unaltered neck braces designed for motorsports use is mandatory.
HELMET: Full coverage (Full Face) helmets designed for competitive motorsports use are mandatory. Helmets are to have a minimum Snell Foundation 2000 sticker in place. All helmets must fit that person properly and be secured while in competition, any long hair needs to be tucked inside the helmet. NOTE: The Kart Way reserves the right to reject any helmet they feel is unsafe.
CHEST PROTECTOR: SFI 201.1 mandatory for all ages 12 and under.
MISC. SAFETY: Elbow, knee, shoulder or any other protection devices are recommended. 
NOTE: All safety apparel is subject to pre-race inspection, and re-inspection at any time. Failure to pass the safety inspectors minimum requirements will be cause for disqualification from that event.
 

30.  FLAG RULES:
GREEN FLAG/LIGHT: Used during an event to designate the start or restart of a race and to indicate the track is clear for competition.
YELLOW FLAG/LIGHT: Used during an event, indicates caution on the track. Reduce speed and hold your position (no passing).
RED FLAG/LIGHT: Used during an event, all competitors are to stop as soon as safely possible and stay where you are until given signal to move.
WHITE FLAG: Indicates race leader has started the last lap of the race  NOTE:  In the event that a caution (yellow flag) is thrown after the white flag has been thrown, the race will be called complete.
BLACK FLAG: A rolled black flag pointed at a competitor indicates that driver is on the borderline for disqualification. Open black flag means that driver has been disqualified from that event. If black flagged, driver is to leave the track immediately in a safe manner. Black flags fall into two categories competitive or mechanical. A competitive flag means driver will lose all points for that race. A mechanical black flag means driver will get last place points for that race.
BLUE W/YELLOW FLAG: Indicates you are being lapped and must yield the racing line for lapping karts to pass. Move to the outside.
CHECKERED FLAG: Indicates the end of that event. The checkered flag may be used with other flags to convey a message to competitors. EXAMPLE: Checkered and yellow together indicates the race is complete and you need to use caution on the track during the final lap.
YELLOW OR RED FLAG RESTART: Karts will be lined up according to the last completed lap. All karts judged by track officials to be involved in the yellow/red flag incident, if able to continue, will be placed at the rear of the field. All karts entering the pit area during a yellow flag incident will be realigned to the back, in the grid area and held there until all on track positions are realigned.  Karts leaving the track during a heat race, whether during a yellow flag or not, will not be allowed to reenter the race. 

31.  NO RACING THE FLAG:  During yellow flag conditions there will be absolutely no racing back to the flag. Once the yellow flag and safety lights are displayed, all karts are to slow down and fall into single file formation in the position they were running.

32.  TWO FLAG RULE:  Any kart responsible for causing/being involved in two yellow flags in any one event will be disqualified from that event receiving last place points and required to leave the track.  First yellow, driver will be relined up.  Second yellow, driver must leave the track.  

33.  RESTART:  If no lap has been completed, line-up in original order. Restarts after a yellow or red flag will revert to the most current order of last completed lap with all involved parties moved to the rear.

34.  RED FLAG:  No pit crew members are permitted on the track while a race is in progress or during a red-flag period; except with a specific permission for officials in charge. If race is red-flagged, adjustments of any kind on karts during the red flag period is prohibited.

35.  COMPETITOR:  Any competitor who is or appears to be injured or involved in any incident causing a yellow or red flag shall be placed at the back of the restart order upon resumption of the event.

36.  COURSE MARKINGS:  All competitors are required to obey all course markings, whether cones or other style markers are used. If you are unsure of the course or as to certain markers, ask a track official prior to your race. Markers must be observed by all drivers at all times. If, in the opinion of a track official, a participant, is purposely ignoring/knocking over course markings, the participant will be subject to disqualification from the event.

37.  ELECTRONIC TIMING AND SCORING:  When electronic timing and scoring is used, it is the driver's responsibility to ensure that the transponders are securely mounted on karts before entering the track. Failure to pick up transponder could cause competitor to be subject to not being scored or timed for qualifying and/or race.  Anyone renting a transponder will be responsible for any repairs that may need to be made.  In order to rent a transponder from Meadowview Kartway you will be required to leave a credit card or a check made out to Meadowview Kartway for the amount of  $250.00 with the registration building before receiving a transponder.  Checks and credit cards will be returned once transponder is returned in the same condition as when rented. 

38.  RACE PROCEDURE:
Heat one race: Once registered the computer will decide the starting position by random.  Points are awarded for the heat one race.
Heat two race: The second heat race is set for the same division, but inverted from the draw for heat one race. Points are awarded for heat two race.
Feature race: The points that are awarded for the heats are then added up, the driver with the highest points starts on the pole for the feature.

39.  HEAT RACES:  A minimum of (3) karts in a class is required to constitute the running of any heat race for that class. A maximum of (8) karts is allowed in a single heat race, the Kart Way reserves the right to alter the number of karts in a heat race. Once the maximum of (8) has been reached. (2) or more heat races will be run per class provided ample karts exist.

40.  FEATURE RACES:  A minimum of (3) karts are required to constitute the running of a feature event for that class. A maximum of (12) karts may qualify for the feature event, with the remaining karts placed in a semi-feature, provided (3) or more are present. The top (10) karts with the highest heat points, qualify for the feature, the (2) best finishes from the semi-feature races that are not in the top ten in points will transfer into the feature and occupy the last (2) starting positions at the rear of the field.

41.  SPORTSMANLIKE DRIVING:  The spirit and intent of sportsmanlike racing competition is to proceed on the track without touching or endangering the vehicles of fellow participants. Inadvertent contact is a reality of racing, however, if in the judgment of the presiding officials, a participant is bumping, crowding, chopping, blocking, or pushing other participants in other than an inadvertent manner, that participant shall be subject to immediate disqualification and possible suspension.

42.  EXITING TRACK:  At the completion of the race, the top 4  karts exiting the track must proceed to scaling area or they will be ineligible for points and/or awards.

43.  ALTERED LINEUP:  The Kartway reserves the right to alter a starting line up by: Starting slower drivers at the back of a particular event. And by placing karts involved in earlier accidents to the back of their next event if in the judgment of the official, that repairs made to that kart may not be sufficient and may cause a hazardous situation.

44.  HOT LAPS/PRACTICE:  Hot lap by class. Only 6 karts allowed on the track at a time. If an entrant does participate in unassigned practice period, the race director may elect to start entrant at the rear of grid for subsequent events. After packing or between events, hot laps are not allowed, unless prior permission has been granted by track officials.

45.  STARTS/SETTING THE PACE:  On all starts or restarts, the kart on the pole sets the pace.  The outside pole kart and all others are required to keep pace.  Race will start if pole karts are setting a even pace. Anyone failing to stay in line, holding up the race or jumping the green will be cause for a yellow flag and sent to the rear.  Race starts will be on front straight away in just before the flagman.  A single white line will indicate where the race starts and finishes. Acceleration is not allowed until the green flag is displayed.   The starts will be side by side, after 1 yellow all restarts will be single file.

46.  PACE LAP:  All karts scheduled for the next race event will line up in their proper order in the grid-area while the previous race is in progress. Once the track is clear, the next field of karts will take to the track and continue around until the green flag is given. Pole sitter sets the pace.

47.  OFF PACE:  During any event any competitor slowing/falling off pace or leaving the track is required to raise one hand to signal to other competitors and officials of their condition and ride the outside of the track. Any karts under the discretion of the flagman that is not maintaining a safe competitive speed will be allowed one lap to get back to speed, if proper speed is not attained that kart will be black flagged as a safety hazard.

48.  STARTING GRID RULES:  The starting grid is a designated area between the track and pit area where pre-race line-ups are conducted and engines are started. The kart, driver and one crew member per team will be allowed in the starting grid area prior to the race. Once the race has started all crew members need to proceed to watch race from behind fence. NOTE: Competitors are required to be at the starting grid on time and ready to race.

49.  90 SECOND RULE:  All drivers have 90 seconds to start from the grid and enter onto the track at the start of the race. Once all karts have entered onto the track the 90 second rule no longer applies.  Races will not be held up to restart or work on karts.  Drivers must pull off the track so the race may continue. 

50.  ON TRACK:  All drivers must remain in their karts at all times while on the track, including yellow/red flag periods unless instructed by an official or in the case of fire being present. Only track/safety officials allowed on the track during accidents.

52.  NO DRIVING IN THE PITS/COLD PITS:  Karts will not be moved under power in the pit area.

53.  INFIELD:  Only authorized personnel are allowed in the infield. During all on track events any kart that spins or is forced into the infield by competition is required to slow to a reasonable speed and use extreme caution while returning back onto the track. If constant traffic does not accommodate for a safe return onto the track, drive slowly to a position where the flagman can safely direct you onto the track. NOTE: Anyone going off the outside of the track will be required to follow the same safety procedures as the infield rule.

54.  SHORTENED RACE:  When only one or two laps remain in an event and a yellow or red flag incident has stopped that event, the official in charge reserves the right to call the event complete. All positions will be scored according to the last completed green flag lap except for the karts involved in causing the yellow/red flag.

55.  FINAL LAP ACCIDENTS:  Once the leader has received the checkered flag, the race is officially over. Karts involved in multi-kart accidents on the last lap that fail to cross the finish line, will be scored behind all finishing karts in the order that they were running during the last completed green flag lap.

56.  LEAVING THE TRACK UNDER GREEN FLAG CONDITIONS:  Karts leaving the track under green flag conditions during heat races will not be allowed to re-enter that race. During feature events karts leaving the track may return to that race, provided time and laps permit, and provided that they have not been disqualified.

57.  LAPPED KARTS:  Participants about to be lapped by faster competitors are responsible for being aware of the approaching faster karts and must yield the racing line until the faster karts have passed. Lapped karts will observe the passing (blue) flag to subject themselves to disqualification. When being passed move to the outside of the track.

58.  SLOWING ON COURSE:  When a kart slows from racing speed on course, the driver must signal such to approaching competitors by raising a hand high enough to be clearly visible from behind. Move to the outside of the track and stay there until up to speed.

59.  IMPOUND AREA:  Karts retiring from event must weigh in and proceed to the impound area or they will be ineligible for points and/or awards.

60.  DRIVER CHANGES:  In the event the registered driver cannot continue, a substitute driver may be selected to finish the remainder of the races. That kart/driver will be positioned at the rear of the field in all remaining races. You must notify track officials at least one full race prior to driver change. Points stay with the driver.

61.  CLASSES:  The Kartway reserves the right to alter any weight, restrictor plate or age requirements to enhance or even-up competition. The Kartway may also place any driver into another class if said driver is found to be more talented and or faster/slower than the group that driver is currently competing with.

62.  NUMBER OF KARTS:  Kartway reserves the right to restrict the number of karts that may compete in any race or event on any given night, and to cancel any race they feel does not have a sufficient kart count.

63.  RESTRICTED AREAS:  No person is allowed on or crossing the track surface or entering the infield at any time, unless instructed to do so by a track official.

64.  LINE UP BOARD:  All race line ups will be posted on the line up board in the grid area as soon as they are determined. All and any race procedures or changes will be posted on this board, as with any driver and any informational meetings. Competitors are required to keep abreast of the information provided on this board.

65. PIT PASS:  No pit pass may be refunded once any kart has taken to the track. Our insurance takes effect as soon as any kart goes onto the track, no matter if the kart is just packing the track, the full premium has to be paid regardless. Pit pass sales are used to pay insurance. We are sorry, once the program has begun no refunds are possible. During rain-outs or any unforeseen program cancellation, and prior to any kart entering onto the track, we will carry over all pit passes to the next regularly scheduled event. You are required to retain your original pit pass, and produce it at the sign-in booth at the next event.  NOTE: Anyone not having their original pit pass, in legible condition at the next event will have to purchase a new pass. No pit pass may be transferred to another person at any time.

66.  RAIN-OUT:  All heat races must be completed for an event to be considered a full show, anything less will be deemed a rain-out. During rain-outs all heats/feature points will be divided evenly between those making the feature for that event.

67.  PIT AREA RULES:  Any person entering the pit area, whether affiliated with an entrant or not, are to be aware of all rules and are required to abide by them.

68.  FIRE SAFETY:  The use of welders, cutting torch, cooking grill, campfires etc. prohibited at anytime. A fully charged fire extinguisher is a must for each race team.

69.  WASTE OIL/FUEL:  All competitors are required to have a suitable container for disposal of waste oil and fuel.

70.  PIT DRIVING:  No kart is allowed to move about any part of the pit area under it's own power, or while being pushed or carried with the motor running. You need to push your kart with the motor not running to the designated starting grid area. When leaving the track a designated shut down area will also be provided, from that area the kart must be pushed back to your pit-stall.
NOTE: Kart engines may be run while kart is in your pit-stall either on a kart stand or sitting on the ground provided you have a person to apply the brakes continuously while the motor is running, NO person is allowed sitting in any kart while said kart is on any type raised kart stand. You may not push or move any kart while the motor is running regardless if a person is in the kart or not. NOTE: Any motor vehicle driving in and out of the pits should be at a snails pace.

71.  WEEKLY POINT TIE:  For next event line up purposes any point tie between competitors will be decided by a card draw between competitors, with the winner of the card draw starting one position closer to the front.

72.  END OF SEASON POINTS TIE:  In the event of a tie in the point standings, the following tie breaking process will be used. First tie breaker: Number of first places finished. Second tie breaker: Most top five finishes.

73.  OFFICIAL TIE RACE:  In the unlikely chance that a dead heat or tie in a final finishing position occurs, that position will be awarded to the kart moving up the most positions during that particular race.

74.  END OF SEASON POINTS:  The best 18 races out of 19 will be counted for year end points.  Drop Nights - 1. 

75.  POINTS/SHOW POINTS:  25 pts. will be given for each driver showing up for a regular scheduled event.  No show points will be given for complete rain outs.        

CHAMPIONSHIP         FINISH                   8 LAPS            8 LAPS          15 LAPS
 Position                         Points awarded:        Heat races        Semi                Feature
    1.                                                                    27                  Adv                 200
    2.                                                                    24                  Adv                 175
    3.                                                                    21                  Adv                 155
    4.                                                                    18                  Adv                 140
    5.                                                                    15                   65                   130
    6.                                                                    12                   60                   120
    7.                                                                      9                   55                   110
    8.                                                                      6                   50                   100
    9.                                                                                           45                     90
  10.                                                                                           40                     80
  11.                                                                                           35                     75
  12.                                                                                           30                     70


75.  FACTORY STOCK-UNALTERED DEFINITION:  All engine parts must be in their original and "as cast" configuration. Any evidence of any machining, sanding, polishing, relieving, grinding, porting, coating, chemical-treating, abrasive-blasting, or any other alterations to the original form, or the addition of any material to any ports or chamber is prohibited. Any and all parts may be checked against known stock parts.

76.  TECH AREA:  Inspection areas, impound areas and/or other areas said designated by the Kartway officials are off-limits to all participants. Competitors may enter these areas only upon the specific direction of the official in charge.

77.  REFUSAL TO TECH:  Refusal to tech, or the exchange of engine parts, shall be considered an admission of noncompliance with the specifications by the competitor, subjecting the competitor to disqualification for that event and possible season suspension. And loss of all points.

78.  FOUND TO BE ILLEGAL:  Upon tech inspection if found to be illegal, driver may be subject to disqualification and loss of all points.  Punishment will be made per the type infraction and be made by the Race Director/Technical Inspector. Any parts found to be illegal will become property of Meadowview Kartway. 

79.  TAMPERING:  Any seal, tag, or markings applied to the engine, tires, or kart by officials to identify tech compliance may not be duplicated, counterfeited, altered or tampered with in any way. Any sign of tampering will be cause for immediate disqualification and/or suspension.

80.  MISCELLANEOUS:  All karts must be equipped with a positive acting throttle return spring. Radio communication devises not allowed. No mechanical devises allowing the chassis adjustments to be made from the driver's seat while the kart is moving.


SPEEDWAY DIRT DIVISION REGULATIONS


1.  TRANSPONDERS                                                                                                       Transponder must be mounted in the center of the nose cone using an L bracket with the Transponder mounted Vertical to the ground.  

                                                                                                                                                          2.  FRAME AND OVERALL DIMENSION:
     2.1   FRAME:  Of proven safe design, main frame members shall be constructed of nominally round tubing, allowing for normal distortion and elongation near bend radii. Minimum diameter for main frame members is 1.0" and maximum diameter is 1.4". Minimum tubing wall thickness at 1.0" diameter is .078". Minimum wall thickness at 1.125" diameter or greater is .060". Frame material shall be, at minimum, cold-rolled, electric weld (ERW) steel tubing or material of at least equal strength. Oval type tubing is not approved.

    2.2  DRIVER POSITION:  When normally positioned on the kart for racing competition, the entirety of the driver shall be within the specific width and length dimensions of the kart.

    2.3  WHEELBASE:  Maximum 43.0" minimum 40.0", as measured longitudinally between the true axle centers.

    2.4  MINIMUM TREAD WIDTH:  28.0" as measured from outside of one tire to inside of opposite tire laterally.

    2.5  OVERALL MAXIMUM WIDTH:  50.0" for all classes.

    2.6  OVERALL MAXIMUM LENGTH:  74.0".

    2.7  HEIGHT:  Maximum of 26.0".

    2.8  FLOOR PAN:  Floor pan shall be of a design that would prevent any portion of driver's body to pass between these components to the track surface.

    2.9  MINIMUM KART WEIGHT:  Dry weight, fully equipped: 85 lbs.

    2.10  WEIGHT BALLAST:  Non-structural weights added to meet minimum kart/driver weight requirements must be bolted securely to the kart. Bolts of minimum 5/16" diameter must be utilized. To secure weights, anything in excess of 7 lbs. must use two or more (2) 5/16" bolts. All bolts must be cotter-keyed or double nutted. All bolt on weights must be white in color for visibility. Mounting of weights to nerf bars & rear bumper is prohibited. Weights may be mounted on front bumper if nose cone is used. No added weight allowed on driver.

    2.11  DRIVER WEIGHT AND WEIGH-IN:  All drivers are subject to a minimum combined kart/driver weight check prior to events and a mandatory post-race weight check. Points will be awarded to only those satisfactorily completing post race weight check.

    2.12  SUSPENSION:  Use of suspension components of any type, including springs, shocks, etc., is prohibited.

3.  WHEELS AND TIRES:
    3.1  TIRES:  Burris SS-33's Only. New karters are allowed 3 races before having to switch to the track spec. tire. No points will be awarded.  No grooving, siping, recapping or warming of any kind.  No modifications to the tire in anyway shape or form. Chemical prepping/tire alteration will not be allowed on the grounds at any time. No open flames. Any deviation to this rule will be at the discretion of the Race Director.  Participants not running on the spec tire should contact the Race Director before racing to get approval.

    3.2  WHEELS:  Material optional, but must be of proven design capable of maintaining tire bead seal in competition conditions. 6" rim sizes are the only accepted size. No "G-rings" or lateral supported wheels allowed. Maximum width on any tire and wheel combination on 10 3/8". The dish (opening) of the wheels may not be covered. No hubcaps, tape, or any other material allowed.

    3.3  WHEEL WEIGHTS:  Clip-on or double back tape wheel balancing weights are not to exceed 1/4 oz. weight each. Additional security is suggested when utilizing stick-on weights. A lack of security is not grounds for disqualification.

4.  AXLES AND HUBS:
    4.1  WHEEL HUBS:  Must be constructed if metallic materials.

    4.2  WHEEL BEARINGS:  Ground-ball or roller-type bearings only. Split race bearings are not acceptable. Wheel bearings must be adjusted so there is no excessive wheel play.

    4.3  FRONT SPINDLE ASSEMBLY:  Front axle nuts must be cotter-keyed. Berry clips or circlip-type safety fasteners are allowed in place of cotter pins where applicable. The use of castle type nuts is suggested. Bolts must be keyed in such a manner to prevent any movement of bolt or nut without key removal. Note: Any fastener (nut on bolt, etc.) of a component that would enable movement of or adjustment of spindle(s), such as for castor, camber, etc.., must be drilled for and utilize either a cotter pin or safety wire.

    4.4  REAR AXLE ASSEMBLY:  Axles may be solid or tubular of one piece design. Minimum diameter is 1"(25.4 millimeters). Maximum axle diameter is 1.25". No carbon fiber or carbon fiber composite axles allowed.  Both driving wheels must be locked to the rear axle with a "live" axle design. Self-clamping hubs may utilize snap ring instead of nut. Snap-rings, or similar fasteners are required at each end of the rear axle. Snap ring grooves may not be cut in axles anywhere between the wheel hubs.  If hub extends beyond end of axle, hub must be pinned or tethered.  Axle stiffeners are allowed as long as they are secured by cotter pin, through-bolt or circlip.

    4.5  AXLE WIDTH:  Front spindle axle and rear axle may not protrude beyond outside of rim and tire.


5.  STEERING AND STEERING SHAFT SPECIFICATIONS:
    5.1  STEERING GENERAL:  Must be of direct, mechanical type. All steering assembly bolts and nuts, including spindle bolts, must be cotter-keyed or safety wired. All bolts will be minimum 14,000 lb. tensile strength and be minimum 1/4" diameter, and at least Grade 5 or US Mark 3 rating. All rods ends must have universal type swivel joints.

    5.2  SOLID SHAFT:  Minimum .625" diameter cold-rolled steel, one-piece design. Wheel attachment must be secure with quality nut or cap screw in an axial position with the centerline of the shaft. Welding the steering to the hub or the hub to the upper shaft is not allowed. No quick release steering hubs allowed. No shaft extensions are allowed.

    5.3  TILLER STEERING:  Tiller/vertical shaft steering systems are not allowed. No rack and pinion steering allowed.

    5.4  STEERING WHEEL:  Steering wheels may be completely circular, minimum 10" diameter and minimum 3 spoke design; or may be butter-fly type with 10" minimum diameter, 4 spoke design with minimum 5" grip length on opposing sides.


6.  BRAKES:
    5.1  BRAKES GENERAL:  All karts must have brakes working in such a manner to at a minimum, brake both rear wheels equally and adequately. All bolts and nuts must be cotter-keyed in such a way to prevent the nut from moving. Brake pedal must be secured to the kart with safety wire or cotter keys. No scrub or band type brakes allowed. The linkage from the brake pedal to the master cylinder(s) or bias adjuster must be a steel rod of 6mm (0.236") or larger in diameter.  The rod must have either (1) a  clevis or swivel fitting (Heim joint) at each end and jam nuts in tension with fittings or (2) other OEM brake rod fittings.

    5.2  DUAL BRAKE SYSTEMS:  When used, these systems will consist of 2 independent brake systems, operated by separate master cylinders. One system shall be fully operational if either front or rear system fails; i.e., if bias control is used, it must allow proper operation of the remaining system should either system fail, etc.

    5.3  BRAKE MOUNTING:  All master cylinder and caliper mounting bolts and master cylinder roll pins are to be cotter-pinned or safety wired in such manner that they cannot be loosened without removal of the cotter pin or safety wire. Nylock-style nuts used to hold the brake disc or drum to their hubs is prohibited. Use of steel locking nuts or drilled bolts with castellated nuts, properly pinned, are the only acceptable fastener for disk or drums.

    5.4  PAD MOUNTING:  Since most competition karts have brake pads secured by countersunk bolts, safety wiring is not feasible. Each karter should monitor proper tightness and use appropriate thread locking substance to prevent loss of this hardware.

    5.5  CONNECTIONS AND ROUTING:  Hydraulic brake connections must be tight and free of any visible leaks. All brakes lines should be safely routed to prevent any possibility of being rubbed through or pulled lose while kart is in motion.

    5.6  BRAKE COMPONENTS:  Traditional type brake components only. No carbon fiber components, etc. Brake rotors must be round.

    5.7  BRAKE DISK GUARD:  All karts must be equipped with a brake disk guard (A.K.A Wolfe Plate) located between the brake disk and the back of the seat.

6.  DRIVE LINE COMPONENTS:
    6.1  ENGINE CLUTCHES:  Dry clutches are mandatory in all 4-cycle classes.  No axle clutches allowed.

    6.2  CHAIN GUARDS:  All chain, or gear-driven karts must be equipped with a chain, or gear guard designed to retain a broken chain or gear. Outboard drive systems will be allowed only if the chain and sprockets are completely enclosed from front, rear, top, and outside.

    6.3  TRANSMISSIONS AND TORQUE CONVERTERS:  No transmission, gearbox or other device which permits a change of gear/sprocket ratios while the vehicle is in motion is allowed unless otherwise noted for specific classes. Torque converters prohibited.

    6.4  EXPOSED SPROCKETS:  Karts starting a race or practice which are equipped with an axle clutch or sprocket hub not being used must not have an exposed sprocket mounted in any manner. Sprocket must be removed.  Rear Sprocket hub must not be able to freewheel in the reverse direction.

    6.5  CHAIN OILER:  Chain oilers are prohibited.

    6.6  CHAIN SIZES:  #35 chain is the only chain acceptable chain size allowed in all classes.  No belt drives allowed.


7.  FUEL SYSTEM:
    7.1  FUEL TANK:  If other than stock engine and fuel tank is used. Fuel tank must be constructed of puncture-resistant material and have a secure, leak proof fill closure. Fuel tank must be securely bolted to primary structure/frame/floor pan of the kart. Fuel tank must be located within the mainframe rails beneath the steering shaft.

    7.2  FUEL TANK CAPACITY:  Maximum of one fuel tank is permitted with maximum nine-liter (2.38 gal) capacity. Fuel line will be of adequate length to connect between fuel tank and carburetor. Excessive fuel line will not be allowed. Fuel lines must be safety-wrapped at all connecting points.

    7.3  FUEL SYSTEM:  No pressurized fuel systems are allowed. No axle or electric fuel pumps allowed. Must be pulse-driven fuel pump.

    7.4  FUEL:  No tampering with fuel. No additives are allowed. Alcohol/Methanol with maximum of 800 specific gravity.


8.  BODYWORK COMPONENTS:
    8.1  APPEARANCE:  All bodywork must be neat in appearance and in good repair. Bodywork that appears loose and in danger of falling off may subject the entrant to black flag and/or disqualification during the running of an event. Mounting method open but must be secure and of good workmanship.

    8.2  SOLID NOSE CONES:  Nose cone is the bodywork that extends forward of the rear edge of the front tire. Nose cone must be of a design outlined in diagram. Nose will be teched 6" vertically high from ground; 1" horizontally. Nose will be teched from front of wheel opening to front of wheel opening. To allow for minor variation in nose in "as raced condition" tech inspectors will allow an additional 0.2500" in the 1" horizontal dimension. No air inlets allowed. Nose cone must be a minimum of 8" high, and a maximum of 17" high except Briggs Jr. classes which nose cannot be taller than 14" as measured from ground to highest point on nose cone. All nose cone must have a tire opening equal to or greater than the tire used. No covering of the side of the tire allowed. Use of nose cone as floor pan: The bottom of the nose cone can extend back full width to the rear edge of the front tire. Any part of nose cone behind rear edge of front tire (i.e., used as floor pan) must be within main frame rails. No fasteners may be used such as bolts, screws, pop rivets, etc. to attach additions to the nose. Tape may be added to the nose cone provided it does not interfere with the 1 inch tech rule. Decals are allowed. Rubber baseboard or rubber molding may be used in a safe manner below the 6 inch measured area. No fiberglass or other rigid material may be added. No CIK nose cones allowed.

    8.3  NOSE CONE GUIDELINES:  Nose cone must allow for easy driver ingress, egress and removal from the kart. It may cover foot area up to 3" rearward of both pedals in relaxed position, and must not interfere with driver's ability to operate pedals.

    8.4  STEERING FAIRING:  A fairing may extend from the nose cone rearward on an angle roughly paralleling the steering shaft. Maximum width of the fairing is 10.0" (Chord measurement, not across the rounded surface). No portion of the steering fairing may be located within 3.0" of any part of the steering wheel. The fairing must be mounted with easily bendable tabs or struts. The fairing must be mounted with easily bendable tabs or struts.  The Fairing and/or mounting materials must expose no sharp edges to the driver. Fairing may connect to the nose cone or floor area of kart with a connecting strip not exceeding 6.0" in width, and must not cover the driver's feet, ankles or legs as viewed from above. Steering fairing, if used, must have 6" clearance between all surrounding bodywork. Note: No steering fairing allowed in the following classes: Junior 1 and Junior 2.

    8.5  SIDE PODS/PANELS:  Side panels/pods is the bodywork that extends rearward of the rear edge of front tire to rear edge of rear tire. Side panels or CIK-style pods may be used and must be securely mounted. Side panels (both flat and 90 degree style) must have a rolled or radiuses edge on the front and rear wheel opening if it protrudes beyond the wheel and tire as presented for pre or post race tech, unless attached to a nose cone. If flat (vertical) style panels are used, side panel top edge must have inward radiuses edge. All side panels allowed maximum 1" lower lip. No metallic side panels allowed.

    8.6  SIDE PODS/PANELS DIMENSION:  If 90 degrees panels are used, they may not cover any part of the driver's body, 14" maximum height in all areas. Minimum opening area forward of rear bumper to rearward edge of front tires is 22" minimum, measured with tires straight ahead position. Panels may connect to nose cone. The side panels/bodywork may be wider than rear or front tires. If the side panels/bodywork is narrower than front or rear tires, no more than 1" of the tires may protrude beyond the plane of the side panel/bodywork with maximum overall width being 50. (to be checked at rear edge of tires with wheels pointed straight ahead.) Panels/Pods may not extend beyond rear edge of rear tire.

    8.7  BELLY PAN:  A full floor or belly pan is allowed providing it is within the area inside of the main frame rails and is no higher than the center of the rear axle.  Additional floor pan is also required within front foot cage area.


    8.8  APPLIES TO ALL BODYWORK:
           8.8.1  BODY COMPONENTS:  Body components may not be adjustable while the kart is in motion.

           8.8.2  BODYWORK REQUIREMENTS:  Bodywork must accommodate all applicable bumper and nerf bar requirements.

           8.8.3  COCKPIT:  Kart must have a open cockpit area as viewed from above, except for steering column fairing and nose cone as per above provisions.

           8.8.4  BODYWORK CLEARANCE:  All bodywork with the exception of the steering column fairing must be a minimum of 6.0" from the steering wheel when the front wheels are in a straight ahead position. This is to ensure there is adequate driver entry/egress area.

           8.8.5  NUMBERS AND NUMBER PANELS:  Four numbers are to be displayed on the kart. Including one at the front of the vehicle, on both sides in a vertical plane between front and rear wheels; and at the rear of the vehicle as viewed from behind. Number panels must be of adequate size to accept assigned, disposable numbers. Whether paper-type numbers utilized or numbers are painted or decal on bodywork, they must be readily readable to the scoring and race officials. Numbers will be 1 or 2 digits only. Numbers must be contrasting to the background so as to be clearly visible.
 

           8.8.6  FRAMEWORK: The framework must be of adequate construction to safely hold the other body components for expected race conditions.
 

9.  BUMPER AND NERF BARS:
    9.1  FRONT BUMPER:  Bumper must be constructed of minimum 3/4" diameter steel tubing, minimum tubing wall thickness of .065". The top of the upper "hoop" of the front bumper must be a minimum of 7.75" above the ground as raced. The upper hoop must be supported in at least 2 places in the front portion of the bumper by 3/4" or larger tubing uprights. These uprights shall be within 1/2" of vertical when measured 3.0" down from the top of the upper hoop. Uprights must be welded to upper hoop and welded or bolted at bottom. No weights may be attached to front bumper except approved attachment if bumper is enclosed by nose cone.

    9.2  BUMPER AND PEDALS:  Front bumper that incorporate pedal mounting points must be either welded to the frame or through-bolted or dowel-pinned with safety wire/cotter pins.

    9.3  REAR BUMPER:  Constructed of 3/4" minimum diameter steel tubing, minimum tubing wall thickness of .065" and positioned so that the following requirements are met:

           9.3.1  Maximum height: 7.5" (as raced).
           9.3.2  Minimum height: No lower than bottom of rear axle.
           9.3.3  Maximum width: No wider than rear tires.
           9.3.4  Minimum width: No less than lateral width of main frame rails. NOTE: Oil catch cans not allowed to be attached to rear bumper.

    9.4  NERF BARS:  Nerf bars must be constructed of minimum 3/4" diameter steel tubing, minimum tubing wall thickness of .065" attached with a 1/4" minimum bolts. The overall length of the side nerf bar(s) shall be a minimum of 24.0" measured from the backside of the nerf bar closest to the rear tire in a straight line to where it attaches to the kart at the front. The rear portion of the nerf bar may not protrude laterally beyond the rear tire. Double-high nerf bars are required. Note: Oil catch cans not allowed to be attached to nerf bars.


10.  SEATS:
    10.1  SEAT STYLE:  Sprint-style "bucket" seat only, no laydown seats allowed. Seat must securely locate driver laterally and longitudinally. Seat must be one piece or molded construction, with no "peaks" or add-on sections intended to subvert the seat back height requirements noted below. Seat must bolt securely to the frame and not be adjustable while the kart is underway. No portion of the seat may be located rearward of a plane projected vertically from rear of rear axle.

*Seat height requirements are as follows: Sportsman classes (18-12 age group) 10" minimum as raced.  Junior Classes (12-15 age group) 12" minimum as raced. All other classes: 14" minimum as raced.

    10.2  SEAT ANGLE:  Seat must conform to angles specified. This check will be made in an "as raced condition"; the surface where the kart is placed will be the plane the angles will be referenced to.


11.  TECHNICAL SPECIFICATIONS KID KARTS:  The intent of this class is to allow beginning drivers ages 5 through 7 (and their parents) the opportunity to learn driving skills and mechanical techniques.  It is intended to be a demonstration class.  Tech is optional, but every effort should be made to make racing close so as to not discourage young competitors.  Additionally to teach racing safety and race event procedures to children ages 5 to 7 years old. All participants are "winners".
 

    11.1  SAFETY AND EVENT FORMAT:

           11.1.1  Safety:  Karts must pass pre-race technical inspection before being allowed on track.

           11.1.2  Chest Protectors:  Chest protectors meeting SFI Specification 20.1 are mandatory for all Kid Kart drivers.

           11.1.3  Drivers Meeting:  Driver and parent will be expected to attend drivers meeting before starting of event.

           11.1.4  Event Format for Kid Karts:  Kid Karts will run 2 heats each consisting of 6 laps with a max. time of 6 mins..  Feature race will consist of 8 laps with a maximum time of 8 mins. Top 4 finishers must proceed to the scale/tech area to be weighed and/or teched.

    11.2  KID KART SPECIFICATIONS:
*Chain guard is to completely cover chain when viewed from above.
*Chain/Gearing: Comer - 219 Chain, 10 tooth drive, 89 - axle sprocket.
*Chassis Design - No offset karts. Seat must not be offset beyond outside edge of left frame rail.
*Wheelbase: Minimum 29", Maximum 31".
*Width: Front, maximum 40", as measured to outside of rim/tire (No Min.). Rear minimum 39", maximum 42": as measured to outside of rim/tire.
*Rear Bumper: Continuous loop shape with vertical or angled bracing connecting upper and lower loop rails. Must protect rear tires.
*Steering Height, maximum 20". Seat Height minimum 12".
*Side pods or double nerf bars and nose cones are mandatory.
*Tires: Open compound. Size 10 x 4:50 or 4:60 x 5. Maximum rear tire circumference, 33.75"
*Official weight in optional. Dependent upon physical size of class participants. Suggested weight 125 lbs. to 155 lbs.
*Additional return spring on carburetor or on foot pedal, required for additional safety.

    11.3  ENGINE SPECIFICATIONS:
           11.3.1  Engines: Comer C-50 or C-51.  All engines are to remain stock, as supplied by the manufacturer.  No grinding or aftermarket accessories (including fasteners) except as specifically noted.  The only changes permitted are those that will promote equality among competitors rather than increasing performance.

           11.3.2  Carburetor:  Model SHA 14-12L Dell'Orto.  All parts must be "as cast".  0.475" No-go venturi.  Jet size #54-#58.  No repairs to broken carburetor bodies.  Stripped bold holes may be repaired with thread inserts or next size larger bolt may be installed.  Additional return spring on carburetor or on foot pedal required for safety.  Manifold restrictor issued by WKA.                        

           11.3.3  Air Filter:  Stock air filter with at least one stock filter element.  Flange inside diameter 57mm.  Filter base diameter 89mm.  Filter top diameter 51mm.  Filter length 102mm.  Flange length 16mm.  Flange style centered.  Filter must remain unmodified.  

           11.3.4  Combustion Chamber:  OEM shape.  CC:7.3 minimum using WKA Cylinder Head Volume Check.  The cc measuring plug shall not be used.  Combustion chamber to remain as manufactured.  All threads are to be intact.  If a thread insert is used, it must be full length.  Any attempt to bypass the intent of this rule is illegal.                              

           11.3.5  Cylinder: Liner and aluminum cylinder "as cast".  No grinding allowed at any time.       

            11.3.6  Port Height:  Install dial indicator onto cylinder and zero.  Insert 3mm rod, no longer than 3.00" (76.3mm), approx. 0.25" (6mm) into appropriate port.  Rotate piston until gentle contact is made.  Release 3mm rod, it is to remain unsupported.  Read dial indicator.  Exhaust: 1.200" minimum.  Intake: 0.370" max. 

           11.3.7  Base Gasket:  Must be in place, no maximum thickness.                                         

           11.3.8  Piston:  Must be OEM and stock appearing.  Both skirts must be same length +/- 0.015" both sides.  Minimum piston length from bottom of ring land to bottom of piston is 1.210".           

           11.3.9  Rings:  Must be OEM rings, max.  Gap 0.040".  Rings cannot fall through cylinder.        

           11.3.10  Crank Pin and Wrist Pin:  OEM                                                                          

           11.3.11  Main Bearings:  Brand is non-tech, but must be of same size and type as OEM.  Exception:  Duel row bearings are permitted.  Ceramic ball bearings or any type of exotic design bearings are not permitted.  Seals: Must be installed as OEM.  Seal brand is non-tech, but no attempt to reduce sealing or drag is allowed.  Evidence of leaking seal is grounds for disqualification.                 

           11.3.12  Ignition:  Timing shall be checked with a dial indicator as per published procedure.  Flywheel key must be in place and unaltered.                                                                             

           11.3.13  Ignition Quick Check:  Remove flywheel nut and visually check to ensure that key is in place. 

           11.3.14  Complete Ignition Timing Check Procedure: 1.)Remove spark plug  2.)Remove starter cover   3.)Install dial indicator in spark plug hole  4.)Set dial indicator to 0.0 at top dead center  5.)Rotate flywheel in counter clockwise rotating until the first magnet is exposed to the left of the coil  6.) Observe mounting lug of coil.  Note the bottom of the lug is machined to match the curve of the flywheel.  The left hand edge of the lug (nearest to engine center) is the edge which will be used to determine ignition timing  7.) Rotate the flywheel counter clockwise to align the right hand edge of the magnet with the left hand of  the mounting lug and read dial indicator.  Leading edge (RH) should be between 0.050"  and 0.060"  Any dial indicator reading outside these dimensions is illegal                       

           11.3.15  Plug Boot:  Non-tech                                           

           11.3.16   Plug Wire:  OEM                                                                                              

           11.3.17  Spark Plug:  Plug brand is non-tech.  Plus reach to be OEM.                                  

           11.3.18  Muffler:  OEM C50 or C51 only.  Holes as per illustration for muffler on following page.  One OEM exhaust gasket.  Bolts must be tight.    If safety wired, tech inspector must remove bolts.  It is recommended that a "sniffer" be used to determine exhaust integrity.  Among acceptable "sniffers" are Robinair Model 14970 (low range), TIF Model 5500 and Snap-On Tools Model ACT5600.                                                                                                                               

           11.3.19  Clutch:  Clutch must be run as manufactured.  Shoes must have "Comer" name cast into them.  Shoes must be stock appearing; no polishing or removal of material.  Minimum allowed width of shoes and assembly 0.065".  Shoe length minimum is 2.500" chord measurement.  Spring maximum diameter 0.430 and 9 coils.  Wire diameter 0.075" to 0.80"                                                     

           11.3.20  Shroud:  No taping of shroud allowed.  Replacement fasteners allowed.

    11.4  CLASS INTENT:  Class intent is very clear. Anyone found not in compliance with above rules, (Parents/grandparents/pit crew) are subject to disciplinary action. It is not recommended to disqualify 5 to 7 year olds.




                                   TECHNICAL SPECIFICATIONS
12.  WKA STOCK 5 HP RULES
Note: All parts must be Briggs & Stratton series 13 factory production parts unless specified in this manual. No machining or alteration of parts is permitted unless specifically noted. All parts are subjected to be compared to a known stock Briggs & Stratton part. No reading between the lines. If it is not in the rules, it must remain stock. No titanium parts allowed. UNLESS OTHERWISE STATED ENGINE WILL BE TECHED AS RACED.

    12.1  SHROUDS & COVERS:  Engine shroud and covers must be intact and not modified, except Scatter Shroud made by W.E. Chapps may be used, this includes flywheel shroud unless there are no holes in block for it to be used. Taping on is shroud housing allowed. Tape on block disallowed. Flywheel guard mandatory.  Flywheel guard must be bolted to blower housing, NO revolving screens allowed. Taping of flywheel guard allowed.  NO part of Flywheel guard may protrude inside of the flat plane of the blower housing.  Any bolt utilized to secure sheet metal, shrouding, etc., with the exception of sheet metal secured by the head bolts, may be replaced with larger diameter bolt(s).

    12.2  HEADER/SILENCER:  Exhaust pipe/header must extend beyond gas tank, but not extend past rear bumper (Including silencer, where applicable) and have no exposed sharp edges. Loop header pipes must be wrapped to protect driver from burns. Header/silencer pipe may not protrude inside of exhaust port as to alter port configuration for performance gain. Studs allowed for header pipe attachment to block. NOTE: When silencing device is used, the RLV 8-91 silencer is mandatory. Silencer must be utilized as produced, with no modifications or alterations permitted.
*Gasket and/or silicone allowed to seal the header.
*Header must be of fixed design. No slippy pipes allowed. No extra tubes or extra holes allowed except for heat sensor probe if sensor is used.                                                                                            *Extra HEAT SHIELD above chain guard IS ALLOWED.                                                               *All header pipes must be of continuous length from flange to end of pipe with stages or butt welds permitted (No chamber, infusers, or covers of any type allowed on muffler etc.) A header support brace and safety wiring of header bolts or studs is MANDATORY to assure header bolts remain tight.  It is required that the safety wire wrap around pipe to insure that bolts remain with pipe in case they are stripped out of block.  Silencer must be clamped to header tube and no welding of silencer in any area.  Silencer  must be visible when viewed from any angle.  Header tube and silencer only legal parts.
*The use of exhaust block saver is allowed. It must be round with a 0.75 inches min. and 1" maximum thickness and be made of aluminum. Must have a straight bore with a 1.005 Must-Go ID. Bolt holes must have stock cord diameter.                                                                                                       *Silencer baffle holes .1285" NO-GO maximum all baffles.

    12.3  AIR FILTER:  Any air cleaner permitted that is installed in a safe manner. Filter may not be used as an air ram and must filter from all areas as raced. Any open areas in filter must be covered with a filter sock. (No open areas allowed.)

    12.4  FUEL TANK:  Tank cap must be stock, and in stock position, Briggs& Stratton domed cap with single vent hole and stock gasket or old style cap with metal insert.  Cap splash shields are not permitted.  Brace on tank bracket IS permitted.  No overflow tube is allowed.  Bungee-type strap may be used in ALL CLASSES to wrap around engine and fuel tank to prevent loosening of parts from vibration.  One or two gaskets allowable on carburetor/tank joint.  Only one gasket allowed carb to tank when Blue Print-O-Seal is used.  Tank repair kit may be used in pick-up cup of fuel tank, however an open slot (min. distance of 0.062" (B8)) MUST GO and must be visible at the top of the pick-up cup.     NOTE: Installation instructions for tank repair kit.                                                        Caution: Fuel cap insert may have sharp edges. Handle with care.
1. Remove fuel tank from engine and remove old gasket.
2. Roll fuel cup insert into a coil 1" in diameter or less, with tab on outside of coil insert into the fuel cup in tank.
3. Tab should rest against edge of fuel cup. Push on insert at both sides of seam until seams butt against each other.
4. Reinstall tank and new gasket on engine.

    12.5  FILTER ADAPTER:  Filter adapter may not be funneled or tapered. Top of filter adapter must be flat. Adapter may not be run without an air filter. No sealer between carb and filter adapter allowed.
*Adapter may have rolled edge not to exceed 0.250" from top.
*Maximum thickness of filter adapter is 0.250" (B101), measured from the top of filter adapter to carb air horn mating surface.
*One B & S stock gasket may be used under filter adapter, maximum thickness 0.075".                  *The air intake hole of the air filter adapter must be concentric with the air intake hole in the carburetor and concentric with the outside diameter of the air filter adapter.

    12.6  CARBURETOR:  Allen bolts may be utilized to attach carburetor to block, no studs allowed. Any attempt to bypass, gasket, bolts or bolt holes is prohibited. One or two intake gaskets allowed between carb and block mating surface. No sealer allowed. Only one intake gasket allowed when blue-print-o-seal is used. Carburetor swirl insert may be left in place or removed. If installed, swirl must be in stock position and cannot be altered. Swirl is subject to removal for technical inspection. Air must enter carb at air horn only.

           12.6.1  RESTRICTOR PLATES:*** Must be stock as manufactured, no alterations allowed. Purple plate .425" NO-GO (B12), Gold plate .575" NO-GO (B12), turquoise plate .500" NO-GO (B15). Restrictor plate must be flat and sealed within gasket area, and have one gasket only on each side of restrictor plate. Addition of material of funneling of gasket(s) not allowed. Minimum inside diameter of gasket(s) is .790". Any attempt to bypass, modify restrictor is prohibited. Anodizing may not be removed from restrictor plate. Horstman lettering must be present, and in the up position as raced. Intake restrictors are to be unaltered, and must be as originally manufactured. Along with tech No-Go gauges, officials may use a known factory plate, or any tool necessary to determine legality of part. Restrictor plate violations subject competitor to disqualification and suspension.

*Maximum carburetor bore inside dimension is .695" NO-GO (B6) and this dimension includes the entire length of the carburetor bore. With the .696 No-Go (B6) in the back side of the carb, it cannot hit the butterfly when opened. The carb bore is from the recess on the flange end (end that bolts to block) of the carb to the backside of the throttle shaft. Check with plug gauge from the backside of the carb. NOTE: Use plug gauge B100 as a guideline to check radius where air horn meets carb throat. This plug gauge is not a No-Go gauge. The venturi is from the throttle shaft rearward and cannot be altered.
*Diaphragm side cannot be used to create a pressure fuel feed. Diaphragm side of carburetor parts must be installed as supplied from the factory. Diaphragm cover plate may be surfaced to ensure a proper seal. No silicone or other material may be applied to diaphragm side of gaskets. After-market diaphragms, (including Teflon pumper diaphragm), allowed as long as it is similar material and configuration of Briggs & Stratton diaphragm. Spring and or cap cannot be altered.
*Slotted end of mixture screw is a non-tech item. All other parts of the mixture screw must be stock as from the factory, including rubber O-ring washer.
*Jets must have stock recess on backside, and the hole may be drilled to any size, but configuration must remain stock. Jets with smaller slots allowed. No flat back jets allowed.                                            *No recessing, funneling or oblonging of any holes permitted from front or backside. No drilling of any holes anywhere in carburetor.
*Main metering hole: .062 No-Go (B8).
*Idle hole: .028 No-Go (B8).
*Where butterfly meets with throttle shaft, it shall have a minimum dimension of .059". No modification to butterfly or any portion of the air passageway other than carburetor bore is allowed.
*Butterfly screw: Butterfly screw minimum length of butterfly screw is .322". Butterfly screw cannot be altered.
*Felt or foam washer must be on carb shaft under lever. Rubber seal must be in proper location in carb body for air seal around throttle shaft.  If there is not a recess in the carb body (older carbs) for the rubber seal the rubber seal is not a tech item, but the felt/foam washer still needs to be on throttle shaft.
*Stop-arm on throttle shaft is not a tech item. Arm may be bent, filed or cut. Remainder of throttle shaft must be unaltered, except for throttle shaft measurement on the back edge must be .086" minimum. Front edge must be .040" minimum, machined recess-backside min .030" (B23). Surface may be machined to spec but component must remain stock configuration. Use Micrometer as No-Go. Set micrometer at .086" and if any part of the backside enters, throttle shaft is illegal, then set micrometer at .040" and if any part of the leading edge enters, the throttle shaft is illegal. Carburetor linkage tech stops at the throttle shaft. Bellcrank and link to shaft are non-tech items.  The throttle shaft hole in the body of the carb cannot be moved and should b checked with gauge  (B100A)
*Diameter of carb recess from flange to throttle bore is .726 maximum for entire length, and must remain stock as cast.  The depth of the recess should be checked with gauge (B103)

    12.7  AIR HORN:
Maximum dimension is 1.011" (checked with B11 No-Go gauge). No-Go area is machined area at or below breather hole.
*If choke is retained, it must remain stock and complete.
*No long brass pick-up tube allowed. Screens on either pickup tube on stock carburetor are not tech items. Short tube maximum size is .066" NO-GO (B8), to be checked with #51 drill blank. NO-GO cannot pass completely through tube when checked from either end.
*Breather tube must be removed from carburetor. The hole in the carburetor may be plugged.
*No rifling, metering hole protrusions, dimpling, etc. permitted.
*A tab to reinforce a broken tank bolt ear on the carburetor-to-tank flange of carburetor is allowed.
*Entirety of carburetor casting will remain stock. No after-market coating are permitted.             *Remote mechanical carb adjusters legal in all stock classes.
*Holes left after removal of choke and threaded hole at floor of air horn may or may not be plugged so long as plugging does not protrude into air-horn area.                                                                      *The hole in some of the new carburetors located in the boss used on stock carburetors for the governor linkage must be plugged (if the hole breaks through into the bore) and the material used to plug the hole must not protrude into the bore of the carburetor.

    12.8  HEAD BOLTS:  Any stock head bolt may be utilized and eight are mandatory. Head bolts with stud allowed.

    12.9  CYLINDER HEAD:  Stock Briggs & Stratton 5 HP cylinder head. Machining of gasket surface and post metal bosses on top of cylinder head is permitted. No machining of any other portion of head permitted. Bead blasting or sand blasting of head is allowed. Coils or threaded insert is allowed, providing spark plug is located in original position, and no protrusion of insert into chamber occurs. Three planes of head interior surface are subject to check by depth-gauge to establish their proximity to gasket-area surface. Carbon build up on the head that cannot be readily wiped-off with a dry cloth will be considered part of the head for tech measurement purposes.
*In the flat area above the piston .011" minimum.
*Spark Plug area .408" minimum.
*In the area above valves opposite cylinder bore area .300" minimum. Max. depth of deepest valve contact point .315".
*Cylinder head bolt holes .3480" maximum.
 

    12.10  HEAD GASKET:  Briggs & Stratton production head gaskets are approved and after-market gaskets of general stock configuration (accommodates all head bolts, follows general stock pattern; does not extend to form "Heat sink" etc.) are acceptable. Gasket sealer must not be utilized on head gasket. No aluminum or copper gaskets allowed.
*Head gaskets must be a minimum of .043" thickness at four points between head bolts, front, rear and both sides.

    12.11  BREATHER VALVE:  Stock breather chamber. Valve must be unaltered. Foam is not a tech item. Tech will include complete breather valve assembly including the grommet. Two breather valve chamber gaskets are allowed.  Either Briggs breather part number 555073 or the newer breather 791779 both are legal parts.

    12.12  VALVES:  Stock valves only. No stellite type valve allowed as found in industrial style engines. Must be one angle only. Valves may not be polished or lightened. If working area (that portion of the valve stem translating with the valve guide area) of valve stem is cleaned, no material may be removed, such as linear grooves, cross hatching, etc.
*Intake Valve: 30 degrees (B24). Intake valve minimum diameter is 1.115" NO-GO (B9).
*Exhaust Valve: 45 degrees. Exhaust valve minimum diameter is .990" NO-GO (B9).
*Minimum thickness of valves between top (flat area) and seating surface to be minimum .035" (no "knife edging" of valve allowed.) Valves will be checked with gauge for head thickness and legality will be determined by that gauge (B22).

    12.13  VALVE SPRINGS/RETAINERS:  Exhaust spring may be used on both intake and exhaust, but must meet all stock specs. Metal may be removed from both ends of valve spring to allow spring to comply with No-Go gauge of valve spring. Back facing of upper portion of valve chamber to stabilize valve spring retainers and prevent spring bind is allowed. Maximum exhaust valve spring length is 1.500" MUST-GO (B4); and a minimum length of 1.300" NO-GO. Minimum .088" wire diameter max. .093" measured in three places. Inside diameter of spring .625" minimum, .640" maximum.
*If intake spring (on intake only) is used to must measure a maximum of 1.240" MUST-GO (B4) in length. With a maximum of .087" wire diameter, measured in three places on spring.
*One Briggs & Stratton upper Retainer may be used on each valve spring. Retainer must be unaltered factory stock. Maximum lip thickness Briggs part #23184 is a min of .050" and a max of .058" and Briggs part #555147 is a min of .015" and a max of .025". Stock lower retainers must be used.

    12.14  VALVE SEATS:  Valve seats must meet stock specs, and can be replaced. Seats must have one angle only, 30 degree intake and 45 degree exhaust. Seats may not protrude above block casting or deck surface. Pin Punching may be used to tighten a loose valve seat. No more than eight approx. evenly spaced pin punches per valve seat. When re-facing valve seat it must be understood that if the tool for checking valve seat height enters valve seat, legality will be determined by that gauge.
*Intake seat inside diameter max., 1.004" NO-GO (B1).
*Intake seat maximum thickness .215". Minimum thickness .199".
*Exhaust seat inside diameter max, .880" NO-GO (B4).
*Exhaust seat maximum thickness .215". Minimum thickness .199".

    12.15  CYLINDER BORE:  No circular or machined grooving of cylinder is allowed in any position of cylinder.
*Stock cylinder bore is 2.5625"  NO-GO (B7) and overbore is permitted providing it does not exceed 2.6025" (Approximately .040" overbore).

    12.16  DECK/PISTON CLEARANCE:  Machining of deck surface is permitted. Piston pop-up cannot exceed a maximum of .005" above block surface in either the center or the front of the piston. When measuring piston pop-up, it should be accomplished with bar stock (B5) on a parallel with the piston wrist pin in center of the piston, and using a dial indicator check the piston pop-up in this area. To assure block gasket mating surface is not peak cut, place bar stock (B5) across front of piston, and using a dial indicator check the pop-up in this area. The piston pop-up cannot exceed a maximum .005". Carbon build up on the piston that cannot be readily wiped off with a dry cloth will be considered part of the piston for tech measurement. Decking of block cannot extend into the aluminum at rear of block (Top of fin.)

    12.17  CAMSHAFT:  All cam profile readings must be taken with zero valve lash and degree wheel at top dead center (TDC) of compression stroke. Set dial indicator at zero and do not reset during the profile process. Ground cams are allowed but must meet all Briggs & Stratton factory specs and alignment. Camshaft blanks that have been center drilled from the factory legal. The camshaft lobes must remain flat and of original width. Maximum camshaft base circle is .770".

           12.17.1  CAMSHAFT PROFILE LIMITS:

                            Exhaust

                Lift                     Degrees
              0.050"        38 BBDC to 33 BBDC
              0.100"        21 BBDC to 16 BBDC
              0.150"        2 BBDC to 3 ABDC
              0.200"        21 ABDC to 31 ABDC
              Max. Max. lift is .233"
              0.200"        76 BTDC to 65 BTDC
              0.150"        48 BTDC to 40 BTDC
              0.100"        28 BTDC to 21 BTDC
              0.050"       10 BTDC to 4 BTDC
 

                             Intake

                Lift                      Degrees
              0.050"            7 BTDC to 0 TDC
              0.100"           10 ATDC to 17 ATDC
              0.150"           29 ATDC to 36 ATDC
              0.200"           55 ATDC to 64 ATDC
              Max. Lift is .233"
              0.200"           43 BBDC to 33 BBDC
              0.150"           13 BBDC to 6 BBDC
              0.100"            6 ABDC to 13 ABDC
              0.050"           23 ABDC to 31 ABDC                                                                                                                 
*Ez-Spin start: 45 degrees to 60 degrees ABDC
*Ez-Spin lift Base: .013" minimum, .019" maximum width, .001" maximum drop during the 30 degree duration time. Example: If ez-spin starts at .015", it may drop to .014" and move around between .014" and .015", but not go above .015". Second Example: if ez-spin starts at .015" and rises to .016", it may move around between .015" and .016", but not fall below .015". At no time can the ez-spin or the .001" travel go above .019" or below .013". Note: All cam profile readings must be taken with zero valve lash. When checking cam profile, rotate engine in the normal running direction only. Valves should have no clearance and no spring tension when checked.

    12.18  IGNITION:  Briggs & Stratton factory stock coils are mandatory and must be utilized in unaltered form. No slotting of mounting holes or machining of attaching bolts is permitted. New style composite ignition is allowed. There must be resistance from ground to the spark plug end of the plug wire. Spark plug connector must be stock factory type. Rubber plug boot is allowed. May be run with or without air vane. Note: coils may be rechecked for correct ohms reading after a minimum of 10 minutes.                                                                                                                                *Resistance from plug wire must be 2,000 ohms minimum and 5,000 ohms maximum.

    12.19  STARTER:  New style recoil starter may be retained as produced and intact, however, if new style recoil is removed, starter cup must also be removed. Old style recoil starter must be removed.  Crankshaft may be cutoff to facilitate any style nut and use of electric starter.

    12.20  FLYWHEEL:  Only stock, 5 HP flywheel is permitted. New Briggs & Stratton flywheel part #555657 with machined backside allowed.  If new flywheel is used the ignition may be spaced out on coil post.  New Flywheel part #555657 is a legal flywheel.  Any flywheel key or no flywheel key is allowed. Painting and coating of the flywheel (other than minimal factory over-spray) is not permitted. No machining, glass-beading or sand blasting of flywheel is allowed. Chipped fins because of poor casting is allowable, however, completely broken fins are not allowed. Flywheel washer must be stock. 
*Weight of flywheel shall be 6 lbs. 4 ozs., minimum.

    12.21  CRANKCASE SIDE-COVER:  Side-cover must remain stock except block and side-cover may be pin-punched to help prevent side-cover gasket failure, and stub for governor may be removed and hole plugged to prevent leakage.
*After-market gaskets approved, however, must be of same size and material as stock gasket(s). Up to three crankcase gaskets are allowed.

    12.22  VALVE LIFTERS:  No extended or adjustable lifters allowed. After-market lifters are allowed, and must meet all stock configurations and all stock specifications. No titanium lifters allowed.
*Head of lifter have a minimum .982" diameter, 1.005" diameter maximum.
*Maximum length of lifter 1.606".
*Stock configuration of lifters will be checked with a gauge (B21) and stock configuration legality will be determined by that gauge.

    12.23  VALVE SEAT HEIGHT:  Install a .500" rod in place of the cam and replace side cover. Measure through the valve guide from top edge of .500 rod to the top of the surface of the intake or exhaust valve seat. Minimum 5.485"/Maximum 5.520" (B19). Aluminum may be removed from top of seat to check seat height. Lifter bore and valve guide bore must accept seat height gage rod.

    12.24  CONNECTING ROD:  Connecting rod may not be lighter in weight than known stock component. No .020 undersize rods allowed. No undersizing of connecting rod is permitted, however, rod may be clearanced providing that it is in stock configuration and finish with no "dimpling" or media blasting. Rod ends must be concentric with crankshaft journal and/or wrist pin with no chamfer or breaking edges. Raptor III rod and dipper is legal; Dipper on Raptor III rod may be broken, however it must be a natural break with no grinding, polishing, or bead blasting visible. Old style rod (after market dipper) is a non-tech item.
*Stock rod length is 3.1220" minimum, 3.1333" maximum. Measured from bottom of wrist pin to top of crankshaft journal.
*Oil hole opening, Raptor 3 or old style rod, is .185" NO-GO (B16).                                           *ARC rod part #6328, #6330, #6348, #6350; CKI Part #3875; Horstman Rod Part #H-498100, #H-498101, #498105; Rix Rockets/Ebert Part #3.875; WMS Rod Part #7070, Part #7575 are the only approved after market rods legal for stock classes. No polishing of rods allowed. Steel .250" rod bolts only. Minimum total rod weight 135 grams. Minimum rod weight less insert 113 grams. Minimum insert weight 22 grams.

    12.25  WRIST PIN :                                                                                                               *Wrist pin must not be altered.
*Maximum inside dimension of wrist pin is .290"
*Maximum outside dimension is .490".

    12.26  RAPTER III WRIST PIN SPECS:
*Maximum inside dimension of wrist pin is .291".
*Maximum outside dimension is.490".
*Length 1.715" minimum.

    12.27  RINGS:  Three rings are mandatory. Compression, or top ring, if camfered, may have either a beveled or chamfered inside face, and must remain as manufactured. Scraper or second ring may only have an external circumference relief area. Ends of ring must remain flat. Mandrel check is no longer required. New factory rings from B&S without beveled on top ring and with relief around circumference of second rings are permitted. Excessive end gapping of rings not allowed. New style, beveled top compression ring (factory produced) is approved. Rings must conform to all listed factory specifications and be of stock configuration. Known, standards for piston/ring configurations are B&S factory approved parts. No machining of rings allowed. Exception; lapping and end gapping allowed. Shrinking of oil ring and low tension ring allowed. Rings must be in one piece when removed from block, with the exception of the Raptor III oil ring, all broken pieces must be present in the ring land. If not the ring will be illegal.                                                                                                                                            *Top two rings, .105" minimum width (For wear).

    12.28  OIL RING:  Oil ring must have minimum .085" width (for wear). Groove and six oil relief slots must be present on oil ring. Groove must measure .083" minimum, regardless of condition of ring.
*End gap with rings compressed on ring gauge cannot exceed .500" when checked on ring gauge (B7).
*Top ring cannot exceed standard B&S ring land width of .084 maximum.


    12.29  RAPTOR III RING SPECS:
*Minimum width top two rings .090".
*Overall thickness top two rings .058" + or - .005".  The step of second ring is 0.035" min.
*Oil ring minimum width .070", rings groove must be present.
*Oil ring thickness .100" + or - .005".

    12.30  PISTON:  Stock B&S piston mandatory. No excessive cleaning of top or skirt of piston allowed. Wrist Pin hole may not be relocated, minimum honing of wrist pin hole allowed. No machining is allowed on piston.
*From top of piston to wrist pin bore .937" minimum measurement.
*Minimum piston length is 1.869".

    12.31   RAPTOR III PISTON SPECS:
*From top of piston to wrist pin bore .937" minimum measurement.
*Minimum piston length is 1.671".
*Top two ring-land width .0603" - .0612".
*Oil ring land width .1020" - .1032".

    12.32  CRANKSHAFT:  Stock factory crankshaft mandatory. Stock factory timing gear mandatory, and must be installed properly. Lightening, polishing of counter weights, addition of metal or other material is not permitted. Hardening of stock crankshaft is permitted in all classes to reduce premature journal wear. The power takeoff journal of a sleeve-bearing crankshaft may be machined (Turned-down concentrically) to permit its use in a ball bearing block. Offset crankshafts are not permitted. After market bearing of non self aligning type, with or without shield, is permitted. No stroker crankshafts allowed.
*Minimum crankshaft journal diameter is .990".
*Crankshaft may be clearanced to a minimum dimension of .775" to permit easier removal of the bearing.

    12.33  STROKE:  Stock stroke is 2.4370", plus .007" or minus .010" for wear. Check with stroke pin (B3) or dial indicator.  Stroke is checked by pushing piston down to take up play of rod clearance. Stroke is checked from bottom dead center (BDC) to top dead center (TDC).

    12.34  PORTS:  Porting is allowed. Ports surface are non-visual tech item. No addition of material allowed. Block may not be machined or altered on intake or exhaust port "gasket mating" surfaces. No grinding is allowed on underside of valve seat. No holes in ports allowed. If port is pin-punched, it may not be done in a manner to prevent entry of a No-Go into port area.
*Intake port .880" NO-GO (B1).
*Exhaust port 1.005" NO-GO (B14).

    12.35  BLOCK:  Must be as produced, with no alterations or reworking. Blocks repaired from broken rod damage, cracked lifter area, etc., are permitted providing that repair does not constitute a functional modification of original block. Porting of intake and exhaust ports allowed, block may not be machined on intake or exhaust ports gasket mating surface. No peak cutting of deck allowed. No bushings of any kind allowed except for bushings approved in this tech manual. Du bearing may be installed in conventional block on flywheel side. Extra hole, 1/8" in diameter, may be drilled on flywheel side of block at crankshaft bushing to better lubricate crankshaft (applicable all classes). Sleeving of cylinder block is permitted in all B&S engine classes. Regular ferrous sleeves only, with no coatings or plating, such as nicasil, allowed. The repair of one coil post is allowed, as long as the remaining post is factory and unaltered. Valve guides may be replaced. Aftermarket valve brass or bronze guides allowed as long as they meet stock requirements. Valve guides may be stacked. No knurling of guides allowed. Minor grinding of block behind seal in a double bearing block where crank goes through block is allowed. (to prevent crank from seizing). Chamfering at bottom of lifter bore for clearance purposes only allowed. Diameter of chamfer cannot exceed .500. Chamfer of lifter bore will be teched with a No-Go gauge, which measures .505 (B20). This applies to stock blocks and blocks that have been welded for strengthening purposes. No undercutting of lifter bore permitted.

    12.36  WELDING:  No welding can be done to an engine from the cooling fins upwards except minor welding to lower exhaust bolt hole is allowed for repair weld cannot protrude into exhaust port. The only welding permitted is to repair damage from a broken rod or cracked lifter bore. Welding of lifter bore for reinforcement of breakage allowed. Installation of bushing guide to help reinforce lifter bore area allowed.



                          TECHNICAL SPECIFICATIONS
13.  WKA STOCK ANIMAL 6.5 HP RULES  All parts must be Briggs & Stratton series 12 engine model # 124332 factory production parts unless otherwise specified in this manual. No machining or alteration of parts is permitted unless specifically noted. All parts are subject to be compared to a known stock Briggs and Stratton part. No reading between the lines. If it is not in the rules, it must remain, stock. UNLESS OTHERWISE STATED ENGINE WILL BE TECHED AS RACED.

    13.1  SHROUDS & COVERS:  Engine shroud and covers and control bracket must be intact and not modified, except control cover which can be modified to attach fuel pump (fuel pump must be visible) and throttle bracket also cylinder cover maybe cut for thermal coupler, intake manifold, and exhaust flange clearance. New Briggs & Stratton air shield/guard Part #555680 may replace plastic control cover and control bracket.  All flywheel guards must be bolted to blower housing.  Taping of flywheel guard allowed. Tape on block disallowed. No part of flywheel guard may protrude inside of the flat plane of the blower housing..  NO revolving flywheel guards allowed. Any bolt utilized to secure sheet metal, shrouding, etc.., with the exception of sheet metal secured by the head bolts, may be replaced with larger diameter bolt(s). Stock kill switch is allowed and is no longer a tech item.

    13.2  HEADER/SILENCER:  Exhaust pipe/header must not extend past rear bumper (including silencer, where applicable) and have no exposed sharp edges. Header shall have a maximum length of 24" to be measured in the ID using a .250" wide tape measure. Measurement to be made with silencer off of pipe and tape tight. If any part of the pipe is less than maximum the pipe is legal. Loop header pipes NOT ALLOWED. Header/exhaust pipe MAY NOT PROTRUDE inside of exhaust port.  Header pipes MUST be wrapped to protect driver from burns.
*Gasket and/or silicone allowed to seal the header.
*Header must be of fixed design. NO SLIPPY PIPES allowed. No extra tubes or extra holes allowed except hole for heat sensor probe if sensor is used.
*All header pipes must be of continuous length from flange to end of pipe with stages or butt welds permitted (no chamber, infusers, or covers of any type allowed on silencer etc.). Silencer must be visible when viewed from any angle. Header tube and silencer only legal parts.
*Extra Heat Shield above chain guard is allowed.
*All header pipes must be of continuous length from the flange to end of pipe with stages or butt welds permitted (no chamber, infusers, or covers of any type allowed on muffler, etc.) A Header support brace and safety wiring of header bolts or studs is MANDATORY to assure header bolts remain tight. It is required that the safety wire wrap around pipe to insure that bolts remain with pipe in case they are stripped out of block. Silencer must be tight, secure, and completely intact on the header through out the entire event. Silencer must be clamped to header tube and no welding of silencer in any area. Silencer must be visible when viewed from any angle.  Header tube and silencer only legal parts.
*Silencer baffle holes .1285" maximum all baffles. SILENCER: In events where silencing device is mandatory, use of RLV-91 silencer is mandatory. Silencer must be utilized as produced, with no modifications or alterations permitted.                                                                                             *The flange that bolts the header to the block cannot be thicker than 0.312" Max.

    13.3  AIR FILTER:  Any air cleaner permitted. Must be installed directly to carb. No filter adapter allowed. Filter may not be used as an air ram and must filter from all areas as raced. Any open areas in filter must be covered with a filter sock. (No open areas allowed.)

    13.4  CARBURETOR:  PZ Model 22 Carburetor only. Must be stock as from the factory except any parts that are inside the float bowl or that can be removed through the float bowl are non-tech items. Any 1/4" bolts may be used to attach Carb to intake. No studs allowed. Carb to intake sealer is by O-Ring only. No sealer allowed. Air must enter carb at air horn only. Choke must be as stock as from factory except choke maybe secured in open position. Adapter will be allowed on end of fuel inlet of carburetor for attachment of 1/4" fuel line.
*Maximum throttle bore inside dimension is .874" (A7) NO-GO. Must be as cast.

    13.5  CHOKE BORE: 1.149" (A7) NO-GO. Must be as cast.

    13.6  VENTURI:  Vertical .792" No-Go (A7), this measurement shall be made with the NO-GO held parallel to the bore of the carburetor.  Horizontal .615" NO-GO (A8)for top and bottom of venturi (widest part) , and .602" NO-GO (A20) will be the horizontal check for the narrowest part of venturi, and this NO-GO may not enter slide area. Air pick off hole maximum .061" No-Go (A9).

    13.7  SLIDE:  Minimum length top edge of slide to deepest part of cut away 1.148" NO-GO (A10). Must be stock as from factory.

    13.8  NEEDLE JET:  1.690" maximum length and 1.680" minimum length. Taper on needle must remain stock and will be checked at .500" from the tip of the needle and must not be smaller than .070" NO-GO (A4).

    13.9  RESTRICTOR PLATE:  Must be stock as manufactured. NO ALTERATIONS ALLOWED. Single hole restrictor plate will be used for the 2006 racing season. .505 to be checked with 0.506' NO-GO (A24) gold restrictor will be used for the Briggs Jr. classes. A 0.575" to be checked with a 0.576" NO-GO (A24) Restrictor plate must be flat and placed between carb and intake, and sealed within gasket area. There must be one gasket between the restrictor plate and the intake manifold. Addition of material or funneling of gasket(s) not allowed. Any attempt to bypass, modify restrictor is prohibited. Anodizing may not be removed from restrictor plate. Horstman lettering must be present, and tab on plate must be on right side when looked at from the carb side. Intake restrictors are to be unaltered, and must be as originally manufactured. Along with WKA Tech No-Go gauges, officials may use a known factory plate, or any other tool necessary to determine legality of part. Restrictor plate violations subject competitor to disqualification and possible suspension.

    13.10  INTAKE: Stock animal intake as supplied from the factory.  No modifications allowed except machining of gasket surface is permitted to meet rule specs.  However the gasket surface must remain flat for proper gasket seal the intake to block, and one intake carburetor mounting hole may be drilled out and checked with a 0.328" NO-GO, and the width of the intake to carburetor slotted hole will be checked with the same NO-GO.
*Length: 1.740" NO-GO 1.760 MUST GO (A12) 
*Inside I.D. 0.885" MUST GO 0.905" NO-GO (A11)
*Intake to block gasket: after market gaskets are allowed.  No sealants are allowed.  Gasket thickness .070" max.
 

    13.11  FUEL PUMP:  Auxiliary pulse-type fuel pump allowed. Fuel pump must be externally mounted.  Fuel pump must be pulsed only from the crankcase upper oil fill cap.

    13.12  VALVE COVER:  Stock valve cover as from factory, that includes the breather hole for the tube that runs to the catch can (no threading of hole allowed).
*Valve cover gasket must meet stock configuration. No sealer allowed.

    13.13  ROCKER ARMS:  Must be stock as from the factory.
*Minimum length is 2.865" NO-GO (A13).

    13.14  CAMSHAFT:  All cam profile readings must be taken with zero valve lash and degree wheel at top dead center (TDC) of compression stroke. Readings shall be measured from push rods. Set dial indicator at zero and do not reset during the profile process. Only stock factory camshaft cores from Briggs & Stratton are permitted, part numbers 555532 and 555584. Lobes may be ground, but not to exceed .870 base circle. Mechanical compression relief non-tech. Camshaft lobes must remain flat and of original width.                                                                                                                                    *Maximum valve lift of 0.255" taken directly off the valve assembly at zero valve lash.  Place dial indicator on valve keeper then tighten ball rocker till you see indicator move 0.001" to 0.002" this will assure that all the lash is taken out of the valve.  Set dial indicator to zero and then check lift.  When checking the lift off the valve keeper the only dial indicator holder that will be used is three leg holder Sox holder #AT320A or similar indicator


           13.15.1  CAMSHAFT PROFILE LIMITS:
                                Intake
                     Lift                   Degrees
                   0.020"             18 to 13 BTDC
                   0.050"             0 TDC to 4 ATDC
                   0.100"             16 ATDC to 20 ATDC
                   0.150"             33 ATDC to 37 ATDC
                   0.175"             42 ATDC to 46 ATDC
                   0.200"             53 ATDC to 57 ATDC
                   0.225"             67 ATDC to 71 ATDC                                                                              

                    Min.                   Min. lift is .252"
                    Max                   Max. lift is .257"
                  0.225"             39 BBDC to 35 BBDC
                  0.200"             25 BBDC to 21 BBDC
                  0.175"             15 BBDC to 11 BBDC
                  0.150"             5 BBDC to 1 BBDC
                  0.100"             12 ABDC to 16 ABDC
                  0.050"             28 ABDC to 32 ABDC
                  0.020"             44 ABDC to 49 ABDC
                              Exhaust
                   Lift                      Degrees
                 0.020"             61 BBDC to 56 BBDC
                 0.050"             44 BBDC to 40 BBDC
                 0.100"             27 BBDC to 23 BBDC
                 0.150"             11 BBDC to 7 BBDC
                 0.175"             1 BBDC to 3 ABDC
                 0.200"             10 ABDC to 14 ABDC
                 0.225"             24 ABDC to 28 ABDC

                 Min                    Min lift is .252"
                 Max                   Max lift is .257"
               0.225"             78 BTDC to 74 BTDC
               0.200"             64 BTDC to 60 BTDC
               0.175"             53 BTDC to 49 BTDC
               0.150"             43 BTDC to 39 BTDC
               0.100"             27 BTDC to 23 BTDC
               0.050"             10 BTDC to 6 BTDC
               0.020"             5 ATDC to 10 ATDC
 

    13.16  BALL ROCKER:  As stock from factory.
*0.590" NO-GO - 0.610" MUST GO (A16)

    13.17  PUSH ROD:  Stock as from factory.
*.185" - .190" diameter.
*Length 5.638" NO-GO - 5.656"MUST-GO (A5).

    13.18  HEAD BOLTS:  Stock head bolt must be utilized and four are mandatory.  All other external metric bolts may be replaced with American standard bolts of appropriate size.

    13.19  HEAD GASKET:  Briggs & Stratton and after market head gaskets are allowed of stock design.  Gasket sealer cannot be utilized on head gasket.  No aluminum or copper head gaskets allowed.
*.049" Min. thickness measured in four places between head bolts. Measurement to be made from inside of gasket. Measurement to be made with micrometers.                                                              *Briggs & Stratton fire ring head gasket part # 555698 allowed.  Minimum thickness 0.042" on metal fire ring part of the gasket.

    13.20  CYLINDER HEAD PLATE:  Must be stock as from the factory.
*Cylinder head plate gasket must be stock configuration. .055" Max. thickness.

    13.21  ROCKER ARM STUDS:  Must be in stock as from the factory.

    13.22  VALVES:  Stock valves ONLY. Must be one angle. Valves may not be polished or lightened. If working area (that portion of the valve stem translating with the valve guide area) of valve stem is cleaned, no material may be removed, such as linear grooves, cross-hatching, etc.  Minimum intake and exhaust valve length 3.372" + or - 0.010"

           13.22.1  INTAKE VALVE:  45 degrees (A22). Intake valve minimum diameter is 1.055" NO-GO - 1.065"MUST-GO (A17). Depth of dish in valve .099" - .119".  Minimum height from angle of valve face to top of valve 0.057" using gauge (A26) (check using a depth micrometer from top of valve to the gauge)

           13.22.2  EXHAUST VALVE:  45 degrees (A22). Exhaust valve diameter is .935" NO-GO - .945" MUST-GO (A18). Depth of dish valve .084" - .104".  Minimum height from angle of valve face to top of valve 0.060" using gauge (A27) (check using a depth micrometer from top of valve to top of gauge)

    13.23  VALVE SPRINGS:  Stock B&S valve springs and keepers are mandatory. Springs must remain unaltered as supplied from factory.

            13.23.1  INTAKE AND EXHAUST SPRING:  Maximum valve spring length is .930" NO-GO (A15) .103" - .107" wire diameter, measured in three places on spring. Inside diameter of spring .615" minimum, .635" maximum.

    13.24  VALVE SPRING RETAINERS:  Stock as from factory.
*.060" - .070" thickness.

    13.25  CYLINDER HEAD:  Stock B&S cylinder head part #555635. Machining of gasket surface only allowed. No machining of ports allowed. Bosses on head may be tapped to allow for the attaching of a header brace.
*Depth of head at shallow part of head .011" min. The measurement on the shallow side of the combustion chamber will be taken with a depth gauge on the push rod side of an imaginary line drawn from dowel pin to dowel pin on valve side of the dowel.  It will also be taken over the spark plug area.  The rest of the recess area in the head has no depth dimension, but the recess must remain visible.  Depth at floor of head .319" min.
*Depth to top of valve seat: .360" max. .335" min.                                                                        *Head thickness measured from head gasket surface to head plate gasket surface is 2.420" (A29).  Head thickness to be checked in four places through the valve guides and the push rod holes with gauge.  Not calipers.                                                                                                                    *Width of combustion chamber at the widest part across the valve seats area checked with a 2.640" NO-GO (A30) at a depth of 0.200" in the combustion chamber.

    13.26  VALVE SEATS:  Must be one angle ONLY on valve seats. Stock B&S valve seats are mandatory.
*Intake seat inside diameter, .966" MUST-GO - .972"(A2) NO-GO.
*Exhaust seat inside diameter, .844" MUST-GO - .850" (A1) NO-GO.
*Exhaust and intake seat 45 degree angle.

    13.27  PORTS:  Must have stock configuration. No porting or modifications of any kind allowed.
*Intake inlet: .918 No-Go (A6) when checking 90 degrees to stud pattern No-Go will be straight, when checking in line with stud pattern No-Go will set on floor port at bottom and stop at upper edge of port on top.                                                                                                                                        *0.864" NO-GO (A28) cannot touch the valve guide of the intake port. 0.860" (A28) Plug gauge will be used as a visual check of the eyebrow area this is not a no-go but a visual assist tool.

Exhaust Outlet: .980 No-Go (A6).

    13.28  VALVE GUIDES:  Stock valve guides as supplied from factory. Stock replacement guide part #555645 allowed. Maximum depth from cylinder gasket surface to top of valve guide is 1.255.

    13.29  DECK/PISTON CLEARANCE:  Machining of deck surface is permitted. No peak decking allowed.  Piston pop-up CANNOT exceed .005" above block surface in the center of the piston. When measuring piston pop-up, it should be accomplished with bar stock (A25)on a parallel with the piston wrist pin and, using a dial indicator check the piston pop-up in this area. Then without moving the dial indicator rotate the bar 90 degrees on the center line of the piston and check the popup it should not exceed 0.005"

    13.30  CYLINDER BORE:
No circular or machined grooving of cylinder is allowed in any position of cylinder.
*Stock cylinder is 2.690" and overbore is permitted providing it does not exceed 2.725" (approximately .035" overbore).

    13.31  STROKE:
Stroke is 2.204" Max. Check with stroke pin (A21) or dial indicator.  Stroke is checked by pushing piston down to take up play of rod clearance. Stroke is checked from bottom dead center (BDC) to top dead center (TDC).

    13.32  IGNITION:  If stock flywheel part # 555625 is used, the coil must be stock Briggs coil part # 557040 must be utilized in unaltered form.  No slotting of mounting holes or machining of attaching bolts is permitted. There must be resistance from ground to the plug wire. Spark Plug Connector must be stock factory type. Rubber plug boot allowed. Note: Coils may be rechecked for correct ohms reading after a minimum of 10 minutes.
*Resistance from plug wire must be 3,000 ohms minimum and 6,000 ohms maximum. NOTE: Coils may be rechecked for correct ohms reading after a minimum of 10 minutes.

    13.33  STARTER:  Recoil starter may be retained as produced and intact, if recoil is removed, starter cup must also be removed. Any style nut and use of electric starter allowed. 

   13.34FLYWHEEL:                                                                                                                            Stock flywheel Briggs part # 555625 or STOCK PVL flywheel Briggs part # 555683.  Any flywheel key or No flywheel key is allowed. No machining, glass beading or sandblasting of flywheel is allowed.  Flywheel washer must be stock.

Weight of flywheel: 4 lbs. and 8 oz. MINIMUM.  (PLV FLYWHEEL WEIGHT-4lbs. 4 oz. No modifications allowed)      
 

    13.35  CRANKCASE SIDE-COVER:  Side-Cover must remain stock.

    13.36  CRANKCASE SIDE-COVER GASKET:  After market gaskets approved, however must be of same size material as stock gasket(s). One or two crankcase gaskets are allowed.

    13.37  VALVE LIFTERS:  Stock lifter as supplied from factory.
*Head lifter have a minimum .820" NO-GO -  .860" MUST-GO (A19).
*Maximum length of lifter 1.515" NO-GO - 1.525" MUST-GO (A14).

    13.38  CONNECTING ROD:  Stock connecting rod ONLY. Connecting rod may not be lighter in weight than known stock component. No under-sizing of connecting rod is permitted, however, rod may be clearanced providing that it is in stock configuration and finish with no "dimpling" or media blasting. Rod ends must be concentric with crankshaft journal and/or wrist pin with no chamfer or breaking edges. The use of all first and second generation, and new Briggs stock rod bolts part # 555654 are allowed.  Minor grinding of crankcase allowed for clearance of new rod bolts.
*Stock rod length is 2.419" minimum, 2.429" maximum. Measured from bottom of wrist pin to top of crankshaft journal.
*Oil hole opening, new or old style rod, is .185" No-Go (B16).

    13.39  WRIST PIN:  Wrist pin must not be altered.
*Maximum inside dimension of wrist pin is .414".
*Outside dimension is .624" - .626".
*Minimum length, 1.901.

    13.40  RINGS:  Three rings are MANDATORY. Compression, or top ring, chamfer or O must face up, and must remain as manufactured. Scraper ring must be installed with inside chamfer down and O up. Stock oil ring must be installed as from factory. Rings must be self supporting in the cylinder bore of the engine being teched.  Ends of ring must remain flat. Excessive end gapping of rings not allowed. Rings must conform to all listed factory specifications and be of stock configuration. Known, standards for piston/ring configurations are B&S factory approved parts. No machining of rings allowed. Exception; lapping and end gapping allowed. Rings must be in one piece when removed from block.
*Minimum width top two rings .095". 
*Thickness top two rings .059"- .064".
*Oil ring minimum width .065", ring groove must be present. Expander ring must be installed.
*Oil ring thickness .098" - .102".

    13.41  PISTON:  Stock, unaltered B&S Animal piston MANDATORY. Wrist pin hole must not be altered or relocated except minimum honing of wrist pin bore allowed.  New style Briggs & Stratton piston with circlip on both sides of wrist pin bore allowed. Deck above top ring must not be altered. No machining is allowed on piston. Arrow must point toward flywheel.
*From top of piston to wrist pin bore .658" minimum measurement. Check on circlip side of piston.
*Minimum piston length is 1.768".
 

    13.42  CRANKSHAFT:  Stock factory crankshaft mandatory. Stock factory timing gear mandatory, and must be installed properly. Lightening, polishing of counter weights, addition of metal or other material is not permitted. Offset crankshafts are not permitted. After-market bearing of non self-aligning type with or without shield, is permitted. Shims if used must be installed as from factory.  No ceramic bearings allowed.
*Crankshaft journal diameter is 1.094" - 1.100".

    13.43  BLOCK:  Must be as produced, with no alterations or reworking. Blocks repaired from broken rod damage, are permitted providing that repair does not constitute a functional modification of original block. No bushings of any kind allowed except for bushings approved in this Tech Manual. The repair of one coil post is allowed, as long as the remaining post is factory and unaltered. No KNURLING of guides allowed.

    13.44  WELDING:  No welding can be done to an engine from the cooling fins upwards. Cam boss repair or welding not allowed.  External welding of block is only allowed to repair damage from broken rod.              

    13.45  CLUTCH:  Dry clutches are mandatory (same clutch used in all other Briggs & Stratton classes).

    13.46  ENGINE SEALS:  The engine will be sealed with two wires one wire will run between a valve cover bolt and a intake to engine bolt to a the nut side of a carb to intake bolt the other wire seal will seal the front side of the cover bolt.

    13.47  FUEL LINES:  Fuel lines must be safety-wrapped at all connecting points.

                                             WINGED OUTLAW KARTS

The karts competing in this class may be built by any competitor or manufacturer.  The kart, as built, must comply with all guidelines set by the kartway officials.

ENGINE RULES: 

125cc AND 250cc (2-cycle only):

* Single cylinder (gas only).

**Stock stroke and rod length as per manufacturer year, model and engine specifications.

* No after market big bore kits.

* No after market stroker kits.

Maximum cylinder displacement:

* 125's are 135cc.

* 250's are 265cc.

* After market pipes, heads, intakes and naturally aspirated carburetors allowed.

500 PRO OPEN:

* Single cylinder (gas only).

* 550cc Max. displacement.

* After market pipes, heads, intakes and naturally aspirated carburetors allowed.

ALL CLASSES:

* All karts must have a 6" nylon tie attached to spark plug wire.

* Kill switch is mandatory.  Mounted on steering wheel or steering wheel post.

* Fuel line location cannot be closer than 2" to any of the exhaust system at any time and shall not be above exhaust.  If closer than 2" fuel line must be insulated.  Fuel line must have ample slack for cage movement.  Must be petroleum grade fuel line.

CHASSIS SPECS:

* Main frame must be similar in design and appearance to karts competing with the addition of a roll cage. 

* Roll cage must be constructed of mild steel tubing, chrome moly tubing, or material of equal or greater strength, must be of a design that protects the driver in the event of an upset or mishap and pass stringent inspection by kartway officials. Same as Q.R.C. Specs. 

* Roll cage must be securely fastened with a safety chain and grade 5 or better bolt, in at least 4 spots.

* Drivers body must be completely inside roll cage. 

* Roll cage height minimum of 2" clearance above drivers head.

* Absolutely no suspension is allowed on any winged outlaw karts.  Spring mounted roll cage on rigid kart chassis only.

* No champ style karts.

SAFETY EQUIPMENT:

* Aluminum racing seat designed for use with a 5-point harness mandatory.  Back of seat shall not be inclined less than 60 degrees.

* Driver should be able to exit kart without additional assistance.

* Commercially manufactured are restraints only.

* Commercially manufactured seat belts only.  5-point seat restraint system required.

* Fire retardant racing suit mandatory.

* All other safety requirements stated in the regular rules must be followed.

BALLAST:  All non-structural weights added to meet minimum kart/driver weight requirements must be bolted securely to the kart.  Carrying of ballast on the driver is prohibited.  Bolts of minimum 5/16" diameter must be utilized to secure weights, cotter-keyed or double-nutted.  No weight shall be bolted to the underside of the kart.  Where weight is attached directly to the seat of a kart, a large diameter, metal fender washer must be used for reinforcement.  A maximum of 5 lbs. per bolt is allowed.  Any driver who loses weight on the track will be disqualified.  Ballast weights must be painted white with kart number inscribed.  Tape, hose clamps, tie-wraps or fasteners other than bolts are not legal for attaching ballast weights to karts.

SILENCERS:  Must be bolted and secured in a safe manner or driver will not be allowed to race or DQ'd.

WING REQUIREMENTS:  Top wing required. 

* Top wing must be intermediate or open style wing.  Approx. 34-40" wide center section and 42-48" long side panels.

* Length and dimensions will not vary 33%.

* Side panels must not obstruct drivers vision.

* Nose wing optional.

* Wing sliders legal in all classes.

BRAKES:  Rear disc brakes mandatory.  Left front brakes legal.

BODY:  Must be complete.  This includes hood, side panels, floor pan and tail.  May be of aluminum, fiberglass or non-splintering plastic.  No sharp edges.

TIRES AND WHEELS:

* 5" or 6" rims.  Bead lock wheels are allowed.

* Tire: Burris (any compound).  Compound 55 treaded tire is Mandatory on the right rear for all winged classes.

STARTING:  If your kart will start with a kick starter, use it.  All wing karts that are pushed on the track to start, must be moving on their own power before they reach the track.  No races will be held up to wait for karts to start.  This is only fair to the other karts already running on the track.