RULES & REGULATIONS
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PRO CLASS P.M.
[PRO MODIFIED]
Designation: “PM” followed by bike number.Reserved for non-street legal based Buell, XL and FX models.
Requirements and Specifications
Minimum weight at conclusion of run including rider must be:
Single cam 5.4 pounds per cubic inch
Twin cam 5.6 pounds per cubic inch
XL and FX, 4 cam 5.7 pounds per cubic inch
- ENGINE
Engine: Will consist of 45-degree XL 4 Cam, FX Twin Cam and Big-Twin Single Cam designs. Any Engine modifications are legal. Maximum engine displacement: 114 CI. Engines must be naturally aspirated and all air and fuel must be delivered through a single carburetor. Maximum 1.937 venturi bore allowed. 4.030 inch bore maximum. Must use fork and knife connecting rods. No cups or scoops allowed. No CPR systems or vacuum pumps are allowed. No belt driven or rotor gear oil pumps allowed. Crankcase vent tube must be routed to catch can. Cylinder heads must be production-manufactured, pushrod with stock HD valve angles. (+/- 5 degrees).
Fuel: VP Racing Fuels C-25 is the specified fuel. No Fuel additives and /or combustible oil additives are allowed. Dielectric constant, as per AHDRA testing meter, must match baseline reading of specified fuel. Fuel must match color of specified fuel. Fuel must match AHDRA generated graphs in random Gas Chromatography analysis of specified fuel.
- DRIVE TRAIN
Chain Guard: Must have chain or belt guard for primary and secondary drives
Transmission: Must have XL or FX based 4 or 5 speed transmissions. Belt drives are legal. Rear wheel drives may consist of ratios. Air shifters and electric shifting devices must be manually operated. No automatic transmissions. No variable speed belt drives. No slipper clutches allowed. Clutch must be manually operated by rider's hand.
- SUSPENSION AND BRAKES
Brakes: Front and rear mandatory (disc or drum).
Controls: Handlebar controls must be located in safe, workable position. Minimum Handlebar width is 20 inches. Foot pegs and foot controls must be located in safe, workable position and must be mounted in a safe, craftsman like manner. Foot pegs are recommended to be 12 inches in front of rear axle. All controls must meet or exceed OEM equipment standards. Snap-back throttle return mandatory.
Suspension: Front suspension minimum size 30 mm and minimum travel of 2 inches. Fork tops required.
- FRAME
Frame: Stock production, aftermarket and specialized racing frames any style chrome moly or steel frames allowed.
Ballast: Permitted. Ballast must be in weight box or securely bolted to frame by a minimum of one 3/8-inch bolt per 5 lbs.
Ground Clearance: Minimum of 2 inches with rider on motorcycle and 10 p.s.i. in rear tire (includes exhaust and kick stand).
Wheel Base: 70 inches maximum (measure from center to center of front and rear axles), includes chain adjustment.
Wheelie Bars: Wheelie bars are required. Maximum length from center of front axle to center of wheelie bar axle cannot exceed 130 inches.
- WHEELS AND TIRES
Tires: All tires must be "V" rated or specified for racing use by the manufacturer. Maximum rear tire width is 7 inches. Minimum front tire width is 3 inches. Tire width is actual tread or friction surface width.
Wheels: Rear wheel minimum 15 inch, maximum 18 inch. No Carbon Fiber front or rear wheels.
- BODY
Body: All motorcycles must have front and rear fender with gas tank or shell to resemble street motorcycle appearance. Must be mounted and constructed in a safe, craftsman like manner.
Fairing: Allowed.
Seat: Stock OEM or seat with a step to prevent the rider from sliding backwards.
- ELECTRICAL
Ignition: Any ignition system is allowed.
Charging System: Not necessary.
Starting System: Must be electric, kick and external starter. Battery top covers are required. No rollers. No push starts. No dry hops in pits.
Control Switches: Must be mounted and constructed in a safe, craftsman-like manner. Must have an emergency kill switch.
Computers: Only Data gathering computers are allowed.
Lights: Not necessary.
- RIDER
Credentials: Valid AHDRA 8.90 Competitor license.
Helmet: Full coverage helmets only! Must be Snell-2000 or ECE 22.05 approved. Eye protection required.
Protective Clothing: 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.
Race Team Clothing: All team crewman that help start, assist in burnout and stage race motorcycle must wear a uniform shirt that relates to their specific team.
- TECH
Tech: All motorcycles must be teched in before practice. Motorcycle, rider and his protective gear must be present at tech area. Tech official will have final say on any unclear rule or equipment.