History of the motorcycle manufacturer, with their motorcycles being sold by dealers in 67 countries. By the late 1920s or early 1930s, DKW in Germany took over as the largest manufacturer. BMW motorcycles came on the scene in 1923 with a shaft drive and an opposed-twin or "boxer" engine enclosed with the transmission in a single aluminum housing. By 1931, Indian and Harley-Davidson were the only two American manufacturers producing commercial motorcycles. This two-company rivalry in the United States remained until 1953, when the Indian Motorcycle factory in Springfield, Massachusetts closed and Royal Enfield took over the Indian name. There were over 80 different
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.