Carolina Thunder Motorcycle Drag Racing
B-Fuel Pro Dragster

The 50’s, 60’s and 70’s brought about a massive change to the Motorcycle Drag Racing World. When mechanics and riders modified their engines, frames, swing arms and added wheelie bars. Some event adding two or three engines to a custom made racing frame and their creations were not only fast but were crowd drawers at the Drag Strips.

The B-Fuel Pro Dragster is a Purpose-built, Carburetor-Nitro Fuel, High Gear Only, Harley-Davidson® Pushrod 45 V-Twin Engine up to 122 C.I.   Maximum Stock or Stock Type Cases, Knife & Fork Rods with Bearings.   Any Stroke & Crankshaft has to fit Stock or Stock Type Cases, Carburetor Only.   Nitro For Fuel, 11 in Tire Max, 8mm Belt Drive or Chain Primary High Gear Only.  These Nitro Fuel Bikes Are Built Specifically For All Out Drag Racing.

Designation: “ B/F” followed by Bike Number.

Racing Format:
400 Pro Tree – All Run Field ,– Must Pass Tech & Safety Inspection.

B-Fuel Pro Dragster Qualifying Procedure
All entries in the B-Fuel Pro Dragster Class will run round one and two of qualifying on a random pairing basis. After Round Two an Elimination Ladder will be produced based on riders reaction times from round two.

Buybacks:    1st Round Buybacks

Points / Entry Fees / Payouts:
B-Fuel Pro Dragster  —  Rider & Bike is included in the Entry Fee.
Awards At Present = 1st Round Top Qualifier, 3rd Round Top Qualifier, **** Trophies and Payout to the – Winner – Runner Up – Semi.

The B-Fuel Pro Dragster Class will be a Points Class at all CTMDR Events except The ALL Star Race.   The B-Fuel Pro Dragster Class is a Points-Earning Class and at the end of the season a Champion will be crowned. Riders it is your responsibility to monitor and make sure points awarded to you are correct after every event. All requests for points adjustments must be made in writing to within thirty days of the points posting for the event in question.   Give us an accurate description on your concerns.

Please understand CTMDR will strive to keep the points tabulations for all classes accurate and correct and we hope by you monitoring your own points earnings, any errors we have made will be corrected quickly. *** After 30 days no adjustments will be considered.

Requirements and Specifications

Engine:   Must keep design features of Harley-Davidson Engines (Pushrod, 45 V-Twin). Carbureted engine with 122 ci maximum.    Pushrod aftermarket heads are legal including 4 valve heads.    Crankcase and all tanks containing fluids must have vent tubes routed to catch can or have a non-spill breather system on motorcycle. Must have Belly Pan Scatter Shield under engine. Cylinder Hear Restraint Mandatory.

Fuel:   Fuel to be nitro methane and/or methyl alcohol only.   No propylene oxide or nitrous allowed.   Fuel Shutoff Valve is required.   Accelerator Pumps must be gravity fed and actuated by the throttle using linkage or cable.

Chain Guard:  Chain and belt guards are mandatory. Must cover top run of drive.

Transmission:   Not allowed! Single Speed Drive Train Only.

Clutch:   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. NO Clutch Cannons.   They have never been legal on carburetor bikes.

Brakes:   Hydraulic type, Front & Rear, mandatory and must be in good working order. Minimum rotor size is 9-inch diameter, 1/8-inch thickness for rotors.   Rotors may be drilled only if minimum diameter and thickness are maintained.

Controls:   Handlebar controls must be located in safe, workable position.   Foot pegs and foot controls must be located in safe, workable position and must be mounted in a safe, craftsman-like manner.   Mandatory fuel shutoff must be accessible by rider from riding position.   A secondary shut-off device attached to rider (in the event of premature exit from motorcycle) is recommended but not mandatory.   Dual cable push-pull throttle assembly is mandatory.   Lanyard for secondary shut-off must be run through eyelet, allowing the lanyard to be pulled in any direction and closing shut-off.

Suspension:   Front suspension minimum size 32 mm and minimum travel of 2 inches.   Fork stops required; must limit the turning arc to 28 degrees.   Steering dampeners are mandatory.   Rear suspension not necessary.

Frame:   Any type permitted.   All frames should be tig welded and main rails must have a minimum diameter of one inch.   All major frame tubing must be chrome molly and have at least .058-inch wall thickness.   Rake angle must be at least 35 degrees.

Ground Clearance:   Minimum of 2 inches with rider on motorcycle and 10 rear tire (includes exhaust and kickstand).

Wheel Base:   Minimum of 75 inches.

Wheelie Bars:  Wheelie bars are required.   Maximum length from center of rear axle to center of wheelie bar axle must be at least equal the wheelbase but not exceed 130 inches.    Must be securely cross-braced.

Tires:   Must be specified for racing use by manufacturer. Rear tire tread width is limited to 11 inches.

Wheels:   Rear wheel minimum 15 inch, maximum 18 inch. Front wheel minimum 16 inch, maximum 19 inch.

Body:   No body parts are necessary,

Rear Fender:   Rear Fender must cover width of tire and extend past the rear axle.

Fairing:   Are legal. Must be mounted solidly to frame tubes.

Seat:   Seat, tail section and rear fender may be incorporated into one unit and must include a step to prevent rider sliding backward.

Ignition:   Any non-programmable capacitive OR inductive discharge ignition systems are allowed. Hybrid (capacitive and inductive) ignitions are not allowed.

Charging System:   Not necessary.

Starting System:   Must be electric external starter. Battery top covers are required. No rollers. No push starts. Jack Stands are mandatory for starting. 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 Competitor License from any Snatching Body. Proper License Pass Tech & Run The Number

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.

Chest Protection:   Chest protectors are mandatory. “Ballistic chest protection” (meaning bullet proof) is a device worn to protect the rider’s chest from puncture of flying debris in case of catastrophic engine explosion.

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.


Sonny Productions LLC
280 Haynes Rd
Summerfield NC 27358
Sonny / Office 336-643-1367    Cell # 336-580-1638

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