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Kart Guidelines

Briggs & Stratton 5 HP

Brakes: All vehicles 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 vehicle with safety wire or cotter keys. Master cylinder actuating rod or cable must be .250 diameter steel or equal quality cable, with positive fasteners at each end.

Hydraulic brake connections must be tight and free of any visible leaks. All brake lines should be safely routed to prevent any possibility of being rubbed through or pulled loose wile the vehicle is in motion.

All master cylinder and caliber mounting bolts and master cylinder roll pins are to be cotter-keyed or safety wired in such a manner that they cannot be loosened without removal of the cotter pins or safety wire. Use of steel locking nuts or drilled bolts with castellated nuts, properly pinned, are the only acceptable fastener for disk or drums.

Traditional type brake components only. No carbon fiber components, etc.

Drive line Components

Clutches: Clutches are mandatory in all classes. All 4-cycle classes must use dry type engine clutches.

Chain Guard: All vehicles must have a chain guard designed to retain a broken chain. 219 and 35 are the only acceptable chain sizes allowed.

Seat: Spring style "bucket" seats only. Seat must be of one piece or molded construction. Seat must be constructed of material resisting bending or fracture. Seat must have a 4 point bolted mounting to the vehicle frame structure, with minimum 5/16" diameter bolts and load spreading washers.

Roll-Cage Requirements: See roll cage diagram at bottom of page. A roll cage must be welded or bolted to the main frame. The cage must sit flush on the main frame. If cage is bolted, Grade 8 bolt studs or greater must be utilized. with a 5/16" minimum diameter. Richmond Raceway Officials will determine the safety and quality of the cage and the decision to allow a vehicle in competition will be made by raceway management.

Body Work:

Numbers & Panels: Four numbers are to be displayed on the vehicle, including one at the front of the kart as viewed from the front. Three (3) plates with contrasting colors, on both sides and the rear of the vehicle as viewed from behind. Failure to provide adequate numbers will only hinder scoring and may place the kart in questions regarding race results.

Bumper and Nerf Bars:

Front Bumper: Bumper must be constructed of minimum 3/4" diameter steel tubing. The top of the upper "hoop" of the front bumper must be a minimum of 7 3/4" above the ground as raced. The upper hoop must be supported in at least two places in the front portion of the bumper by 3/4" or larger tubing uprights.

Rear Bumper: Must be constructed of 3/4" minimum diameter steel tubing and positioned so that maximum height is 7 1/2", minimum height no lower than rear axle and no wider than rear tires.

Nerf Bars: Nerf bars must be constructed of minimum 3/4" diameter steel tubing, and must be secured by minimum 1/4" bolt. Double high nerf bars are required.

Animal Engine Division:

Fuel System: Fuel tanks must be securely fastened and may be located in either the tail section or between the competitor's legs under the steering column.

Maximum of one fuel tank permitted with maximum nine-quart capacity. Excessive fuel line will not be permitted.

Fuel tanks must be constructed of puncture resistant material and have a secure leak proof fill closure.

Fuel lines must be safety wrapped at all connecting points.

Miscellaneous:

Throttle: It is mandatory for all vehicles to be equipped with a positive acting throttle return spring.

Workmanship: General suitability for competition, workmanship and appearance of vehicle will be considered in approving it for entry in any race.

Spindles: Any fastener (nut on bolt, etc.) of a component that would enable movement or adjustment of spindles, such as for castor, camber, etc., must be drilled for and utilize a cotter pin or safety wire.

Inspection Markings: The method of engine and/or tire marking is at the discretion of Richmond Raceway. Any means undertaken by a competitor to duplicate, counterfeit, or otherwise avoid normal component marking procedures will result in immediate disqualification.

Spec Tires: Any means taken to remove or alter code or identification numbers on sidewall is prohibited and will result in disqualification.

Muffler: Required on all vehicles.

Scaling:

Top 5 finishers in heats and features are required to go to the scales to be weighed in. Failure to do so will result in disqualification for that heat and/or feature.

Any competitor found to be under weight will not receive any points for that heat or feature, and must make weight prior to your next race and start feature in last place.

All non-structual weights added to meet minimum kart/driver weight requirements must be bolted securely ti the kart. Bolts of minimum 5/16” diameter must be utilized to secure weights, cotter-keyed or double nutted. Mounting weights to nerf bars or rear bumpers is prohibited. All weights must be painted white.

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

Minimum Tread Width: 28.0" as measured from the outside of one tire to the inside of opposite tire laterally.

Overall Maximum Width: 50.0" for all classes.

Overall Maximum Length: 74.0"

Wheels and Tires: Pneumatic, designed for racing application types only, maximum diameter 12.5", minimum diameter 9.0". Tires must be available to general market at least 60 days prior to use. No tire softener allowed. Box Stock and all Animal classes are required to use Burris.

All divisions with track tires maybe confiscated during the week.

Wheels: Material optional, but must be of proven design capable of maintaining tire bead seal in competition conditions. No "G-Rings" or lateral-supported wheels allowed. Clip-on wheel balancing weights are not to exceed 1/4 ounce weight each. No split rims. Stick on wheel weights is allowed.

Axles and Hubs: Must be constructed of metallic materials.

Back to Rules Menu

Track management reserves the right to confiscate any competitor's engine or part, at any time, for any reason.

It is impossible to list all the modifications or exceptions that may be considered illegal within this online version of the rule book. For the purpose of enforcement, only those items listed are permissible. It shall be the owner's/operator's responsibility to check with the Tech official if questions arise prior to competing.

Any Rules or modifications to the rules, after the season has started, will be posted on the parts building information board at the track.

Richmond Raceway...Maine's highest Banked Kart Track!