Reserved for Harley-Davidson V-Rod, 60 degree, overhead cam, water-cooled, V-Twin cylinder configuration motorcycle models produced as a purpose built vehicle (VRXSE) Screamin’ Eagle V-Rod Destroyer. Engines must carry racing engine VIN code from Harley-Davidson Motor Company. Motorcycle must maintain stock cooling system (using water and/or propylene glycol only) and intake system as installed at time of production. Motorcycle must be ridden under its own power to staging, starting line and back to the pit area after completion of the run (no towing allowed except for breakage). This is a heads up, .400-second, Pro-tree class. Combined weight of bike and rider must be a minimum of 770 pounds at the conclusion of all runs. Ballasts must be secured in a weight box or securely bolted to frame by a minimum of one 3/8” bolt per 5-pound weight. All motorcycles
will be required to qualify and compete with the Screamin’ Eagle stock fuel injection map and a 10,800 RPM rev limit. AHDRA officials will load this program at random in staging.
- ENGINE
Engine: Only H-D V-Rod, 60 degree, overhead cam, water-cooled, V-Twin cylinder configuration, purpose built model (VRXSE) – Destroyer
engines, as supplied by Harley-Davidson are allowed. All competitors are subject to dynamometer verification of horsepower and torque curves before being allowed to compete in the event and before points and/or monetary awards are presented. After market valve springs, retainers, rod bolts, case bolts and steel connecting rods may be submitted to AHDRA for approval. No other modifications to engine/transmission assembly are allowed. Any wear parts measuring more than .005” out of nominal factory specifications will be considered
modified, and non-wear parts must fall within published factory tolerances. All engines must be naturally aspirated and all air and fuel must be delivered through the OEM supplied throttle body, 58mm diameter above and below the throttle plate. No physical modifications
to fuel system are allowed. No auxiliary fuel pumps, oil pumps or vacuum pumps are allowed. Exhaust system must be as supplied by Harley-Davidson. AHDRA reserves the right to exchange any competitor’s
engine/transmission assembly. This is a “SPEC” class of racing and refusal to comply with an exchange order will cause an automatic forfeiture of all accumulated AHDRA championship points. Crankcase and all tanks containing fluids must have vent tubes routed to factory installed non-spill breather system on motorcycle.
Fuel: VP Racing Fuels U-4.2 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: Top chain guard must be stock as supplied by manufacturer. Lower chain guard may be removed for clearance of lowered foot pegs.
Transmission: Transmission must be stock as supplied by manufacturer
and cannot be modified. Air and electro-magnetic shifting devices are allowed as supplied by the manufacturer. The rider’s hand or foot must manually control the shifting device. Clutch assembly must be as supplied by the manufacturer. Aftermarket billet clutch baskets may be submitted to AHDRA for approval. Clutch basket rivets may be modified in a manner consistent with the OEM specs. Approved examples are available from AHDRA Tech Department.
- SUSPENSION AND BRAKES
Brakes: Front and rear hydraulic disc brakes as supplied by the manufacturer are mandatory.
Controls: All controls must be OEM equipment. Triple clamps supplied by OEM must be used and the fork tubes may not be modified in any way. Aluminum handlebars are not allowed. Snap-back throttle return mandatory.
Suspension: Front suspension must be stock for model and OEM supplied. Fork tube angle must be stock. Internal modifications are legal. Travel limiting straps are not allowed. Rear suspension must use OEM struts. A single hydraulic steering damper may be fitted in a good workmanship manner, which does not substantially modify the frame or forks.
- FRAME
Frame: Only Destroyer, OEM frames supplied by Harley-Davidson are allowed. No modifications are allowed. All entries must be a complete production motorcycle.
Ground Clearance: Minimum of 2 inches with rider on motorcycle and 10 PSI in the rear tire (includes exhaust).
Wheel Base: Wheelbase must be stock length as supplied by manufacturer, 68" maximum.
Wheelie Bars: Wheelie bars are mandatory and must be as supplied by the manufacturer.
- WHEELS AND TIRES
Tires: Front tires must be a Dunlop and have 23.5" x 4.5" dimension on front. Rear tire must be a Dunlop 25" x 7" x 18" as supplied on production motorcycle. Front and rear tire must be from Dunlop.
Wheels: Stock Destroyer OEM wheels only.
- BODY
Body: Stock OEM fenders, simulated headlight, and air box must remain stock. All other OEM fairings and panels must be present and be stock appearing. No raised tank shell brackets are allowed. No modifications to the injector air box are allowed.
Seat: Stock OEM seat with a step to prevent the rider from sliding backwards with a minimum seat height of 20".
- ELECTRICAL
Ignition: OEM system only. No delay boxes or electronic throttle stops. Two-step RPM controls are approved as supplied by the manufacturer. No modifications to the wiring harness are allowed. No sensor defeat devices are allowed.
Charging System: Charging system must be present and in working order.
Starting System: Electric on board starters are required. No jump-starts from an external battery are allowed in the staging lanes. 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 with a tether to rider.
Computers: Only data gathering computers or data boxes are allowed. No traction control devices or RPM shifted solenoids are allowed. No external ignitions or fuel controllers allowed.
Lights: Simulated headlight and working taillight are required.
- RIDER
Helmet: Full coverage helmets only! Must be Snell-2000 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.
- TECH
Tech: All motorcycles must be teched in before practice. Motorcycle, rider and his/her protective gear must be present at tech area. Tech official will have final say on any unclear rule or equipment. Winner and runner-up will be subject to teardown after final round.
- APPEARANCE
The Harley-Davidson logo must be displayed on the tank as supplied
manufacturer. Dimensions (71/2” W x 11/16” H) and designs of painted or repaired logos must be the same as supplied by manufacturer. The Screamin’ Eagle decal must be displayed on the wheelie bar.
