Pro Stock Motorcycle Pro Stock Motorcycle Pro Stock Motorcycle, formerly known as Pro Stock Bike, is a motorcycle drag racing class that is the two-wheeled equivalent of Pro Stock. It has been a feature of NHRA drag racing since the 1980s when it was added to the professional class structure and has since spread around the globe. The first points championship season was the 1987 NHRA season. The class has for years been dominated by inline-4 cylinder Suzuki based bikes but in recent years Harley-Davidson based V-twin machines have become more competitive due to favorable rule changes (160 c.i. Harleys vs. 107 c.i
American Historic Racing Motorcycle Association American Historic Racing Motorcycle Association The American Historic Racing Motorcycle Association (AHRMA) is a vintage motorcycle racing origination that puts on mostly motorcross races, but also holds road racing, dirt flat track, and trials events. The AHRMA was formed in 1984 by Robert Iannucci and Jeffrey Elghanayan as a private business. In 1989 it was reorganized as a member owned non profit organization. During the 70s and 80s groups of riders began emerging around the nation organizing vintage motorcycle racing events. This started primarily with vintage roadracing clubs who were then joined by motocross, trials, dirt track and concours enthusiasts.