Rickman Motorcycles was an independent motorcycle chassis constructor established by brothers Derek and Don Rickman. They manufactured motorcycles from 1960 through to 1975. Rickman initially supplied frame kits, as none of the British motorcycle manufacturers would sell engines. The frame kits were built for many engines, including Triumph twins, BSA singles and Matchless. In the 1970s they began selling chassis kits for the Honda CB750 and Kawasaki Z1. The road bikes were the first to use disc brakes both front and rear. In 1971, Rickman began producing complete bikes in 3 displacements, 100cc 125cc and 250cc. The 100's had Hodaka engines, the 125's had Zundapp engines, while the 250's featured Montesa powerplants. Many of these little motocross bikes were being shipped to America. The bikes were known for their beautiful fiberglass work and nickel-plated frames and are often referred to as "Metisse" frames. The Rickmans had a sense of humor. Google translates the word politely as "mongrel". The company stopped producing complete motorcycles in 1975.