Harry and Gerhard Klemm own a 2-stroke race engine business in Arizona. So naturally, when they decided to go classic racing, they bought 2-strokes.

The bikes the brothers chose were 1972 Kawasaki Bighorns. Never intended to be road raced by the factory, the rotary disc valve 350cc engines produce over 35 bhp. Combined with a light-weight chassis, these bikes are capable of over 100 mph.