Professional motorcycle drag racing classifications and general motorcycle requirements from the respective competition sanctioning bodies.
NHRA
National Hot Rod Association
Pro Stock Motorcyle (PSM - formerly known as Pro Stock Bike)
1998 or later model bikes which retain a stock appearance. Bikes must have a front fender, simulated headlight and taillight, and manufacturer brand on both sides. The engine and body make must be the same brand. Weight minimums are set for each engine configuration and displacement and are subject to change to maintain a competitive field.
AHDRA
All Harley Drag Racing Association
Top Fuel (TF) - Completely unlimited, nitro fueled drag bikes.
Pro Fuel (PF) - Nitro fueled, unlimited drag bikes, 151 cubic inch maximum engine displacement.
Pro Stock (PS) - Stock appearing Buell, Sportster XL, VR, FX based carbureted motorcycles, 160 cubic inch engine displacement limit, minimum weight with rider 550 lbs. post run.
Pro Dragster (PD) - Nitro fueled V-twin drag bikes up to 121 cubic inch engine displacement limit, carburetor only.
Pro Gas (PG) - Gasoline or alcohol burning V-twin drag bkes with various engine displacements and intake system options.
Pro Modified (PM) - Stock appearing street legal Buell, Sportster XL, and FX based.
Street Pro (SP) - Street legal Buell, Sportster, and Big Twin based carburetor only motorcycles, 200 cubic inch engine displacement limit.
ADRL
American Drag Racing League
Pro Extreme Motorcyle (PXM) (Pro Mod Bikes) - Carbureted, gasoline fueled only motorcycles, nitrous allowed, no superchargers or turbochargers. Bodywork must represent original manufacturers design.
AMA Dragbike
American Motorcycle Association
Online Rulebook
Pro Classes
Top Fuel
Funnybike
Pro Mod
Pro Stock
Pro Street
CMDRA
Canadian Motorcycle Drag Racing Association (similar to AHDRA)
Top Fuel (TF) - Unlimited, nitro fueled V-twin drag bikes. injected or supercharged V-twin up to 200 cubic inch engine displacement limit.
Pro Fuel (PF) - Nitro fueled V-twin drag bikes up to 151 cubic inch engine displacement limit, fuel injection only.
Pro Dragster (PD) - Nitro fueled V-twin drag bikes up to 122 cubic inch engine displacement limit, carburetor only.
Pro Gas (PG) - Gasoline or alcohol burning V-twin drag bkes with various engine displacements and intake system options.
Pro Stock (P) - Stock appearing Buell, Sportster XL, VR, FX based carburetor only motorcycles, 200 cubic inch engine displacement limit.
Modified (M) - Race, or street legal, gasoline fueled V-twins up to 122 cubic inch engine displacement limit, with weight restrictions.
Pro Modified (PM) - Modified production-based engine drag bikes running 9.99 second E.T. or quicker. Various fuel and intake systems are legal, with weight restrictions.