PRO STOCK

Requirements and Specifications

Designation: "P" preceded by bike number. Reserved for stock appearing, carbureted, XL, VR and FX based motorcycles with frame and tire restrictions. MUST WEIGH

PRO STOCK IS INVITED TO RUN WITH PRO MODIFIED

1. Engine
(a) Engine:

Must keep design features of Harley Davidson engines (45°‑90° pushrod V-twin). For engine size up to 160c.i., minimum weight including rider at conclusion of run: 550 lbs. For engiine size 160 c.i. to 200 c.i., minimum weights including rider at conclusion of run: 600 lbs. Will consist of VR, XL, or FX based engines up to 200 c.i. displacement. Heads, cyclinders and crankcases may be modified. VR engine must be complete factory cases and heads. Carbureted only. Crankcase and all fluid tanks must have vent tubes routed to an overflow can or have a non-spill breather system.

Belly pans to catch oil drips are mandatory.

(b) Fuel:

Gasoline only. Propylene oxide and/or nitrous prohibited.

(c) Fuel System: Fuel shut off valve mandatory.
2. Drive Train
(a) Chain and/or belt guards mandatory.

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 aluminum mounted on at least two points that are securely mounted.

(b) Clutch:

Must be manually operated by rider's hand. Any type of clutch or belt drive may be used. Clutch assembly must have top and at least half of the side surface covered by .060 inch steel or .125 inch aluminum.

(c) Transmission:

Any transmission with a maximum of six forward speeds and a minimum of three forward speeds may be used. RPM or computer-shifted gear boxes prohibited. Automatic transmissions allowed.
3. Suspension and Brakes
(a) Brakes:

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.

(c) Controls:

Handlebars must be at least 22 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, but must be at least 15 inches in front of rear axle. Air shifters permitted. Air shift bottles must be stamped Dot-1800 pound and be securely mounted. No hose clamps or tie straps.

(c) Suspension:

Front suspension minimum fork diameter 32 mm with a minimum travel of 2 inches. Steering dampener mandatory. Rear suspension not recommended.

(d) Wheelie Bars:

Mandatory. Wheels must be non-metallic. Maximum length from center of front axle to center of wheelie bar axle: 130 inches. Minimum specified construction of .75 inch chome moly and .058 wall thickness.
4. Frame
(a) Frame:

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. Frame may be used as an air tank; not to exceed 150 P.S.I. Some method of checking air pressure is mandatory. Steering head angle not less than stock rake or more than 40 degrees maximum.

(b) Wheelbase: Maximum 70 inches.

(c) Ground Clearance:

Minimum of two inches with rider on bike and 4 P.S.I. in rear tire. (including exhaust)
5. Wheels and Tires
(a) Wheels:

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

(b) Tires:

Must be V-rated or specified for racing use by manufacturer. Any tire size is legal, except for minimum front tire width of three inches. Maximum rear tire width: 10 inches. Automotive tires permitted.
6. Body
(a) Body:

All main body parts must have stock appearance and shape, and connot be mixed between models. Replacement parts permitted, but must retain stock shape.

(b) Fenders:

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.

(c) Fairing:

Permitted. Recommended that fairing be mounted solidly to frame.
7. Electrical
(a) Ignition:

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.

(b) Charging System: Optional

(c) Starting System:

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

(d) Control Switches:

Must be mounted and constructed in a safe, craftsman-like manner.

(e) Computers: Only data gathering computers are allowed.
8. Rider
(a) Credentials:

Valid CMDRA competition motorcycle license required.

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

(b) Helmet: Full face helmet meeting Snell 00. Must have Snell tag.

(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 the ankle. Must have leather gloves. All protective clothing must be in good condition.

Full finger leather gloves with knuckle armor and palm reinforcement, one piece or full circumference zippered leather suit with knee, elbow and shoulder armor or reinforcement, spine/back protector and above the ankle leather boots with toe area reinforcement are required.