Will consist of "XL" or (45 degrees to 90 degrees V-twin) big twin based engines up to 122 cubic inch MAXIMUM (5.24 lbs. per cubic inch). Push rod after market heads, including four valve are legal. CPR systems may be used, but hoses are not be to connected to the intake manifold. Crankcase and all fluid tanks must have vent tubes routed to an overflow can or have a non-spill breather system.

Gasoline only! Specific gravity will be set. Nitrous is not permitted.

Must have front and rear guards to cover the width and at least the top run of the centre 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 to the frame. Rear mounting point to be no more than six inches in front of rear axle. No clamps or tie straps.

Must have "XL" or "FX" based clutch; any modifications are legal including slippers. Clutch assembly must have top and at least half of the side surface covered by .060 inch steel or .125 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 or shifter that can be operated from the legal foot peg location, with the foot on the peg, will be permitted. Air shifters permitted. Air shift bottles must be stamped Dot-1800 pound and be securely mounted. No hose clamps or tie straps.

Front suspension minimum fork diameter is 30 mm with a minimum travel of 2 inches. Steering dampener mandatory. Rear suspension not recommended.

Stock OEM frame with altered or changed swing arm may used. Aftermarket and custom made frames are legal. All frames must be mig or tig welded. Recommended 4130 chrome moly.

70 inches maximum length.

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

All bikes must have front and rear fender with fuel tank or shell to resemble street bike appearance. All components must be mounted and constructed in a safe, craftsman-like manner.

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 on primary side of the ignition circuit.

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

Valid CMDRA competition motorcycle license required.

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.

(c) Protective Clothing:

Must have full leathers. 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.