Fuel shut-off valve is mandatory. The use of fuel enrichners or lean outs are permitted. Carburetors and lean out/enricheners/lean outs must be positioned in the carburetter body only. They may not be placed in the intake manifold or heads. Lean out/enrichner systems may be activated by any mechanical, electrical or pneumatic means. Accelerator pumps are allowed using the following guidelines: accelerator pumps must be gravity fed, force feeding or pressurization is not allowed, accelerator pumps must be actuated mechanically by the throttle using linkage or a cable.

Must have front and rear guards to cover the width and at least the top run of the center line of the sprocket of any chain or belts. Chain guard should be constructed from .060 inch steel or .125 inch aluminum mounted on at least two points that are securely mounted. Rear mounting point to be no more than six inches in front of rear axle. No clamps or tie straps.

Any centrifugal and/or RPM controlled clutch may be used. The clutch must be self-contained. No fluid or electrical inputs may control the operation of the clutch. (Clutch must have strong protective covering.) Guard must be .060 steel or 1/8 inch aluminum.

Front and rear hydraulic type brakes are mandatory. Minimum rotor size is 9 inch diameter x .125 inch thickness. Rotors may be drilled only if minimum diameter and thickness are maintained.

Handlebars must be at least 20 inches overall with grips removed. Handlebar controls must be located in a safe, workable position and mounted in a safe craftsman-like manner. Snap back throttle return mandatory. Foot pegs and brake pedal may be rear set. Any brake that can be operated from the legal foot peg location, with the foot on the peg, will be permitted.

Front suspension minimum fork diameter 32 mm with a minimum travel of two inches. Steering dampener mandatory. Rear suspension not recommended.

Any type permitted. Frame material must be 4130 chrome moly. All frames must be mig or tig welded. Main rails must have a minimum diameter of 1 inch and all major frame tubing must have at least .058 inch wall thickness. Rake angle must be at least 35 degrees.

Front wheel: minimum diameter 16 inches; maximum diameter 19 inches. Rear wheel: minimum diameter 15 inches; maximum diameter 18 inches.

No body parts are necessary. Seat, tail section and rear fender may be incorporated into one unit.

Front fender optional. Rear fender must cover the full width of the rear tire and extend behind the rear axle and forward below seat position.

Any ignition system is permitted. Must be equipped with a positive ignition cut-off, attached to the rider with a lanyard of rawhide, wire, etc. Cut-off must be connected to the primary side of the ignition circuit.

Must be external electric starter; roller or push starts prohibited. Battery covers required for starter cart/vehicle.

Must be mounted and constructed in a safe, craftsmanlike manner.

Starting in 2007 only CMDRA Licenses will be accepted if you’re running 9.99 or quicker. Application and physician’s physical forms available at the CMDRA office.

Valid CMDRA Pro Competition license with fuel endorsement required.

Must have full leathers. Chest Protection mandatory; must meet SFI 46.1 specification. Two piece suits (jacket and pants) must be joined with a zipper at the waist. Must have leather boots/shoes which cover above ankle. Must have leather gloves. All protective clothing must be in good condition.