In 1965, George Roeder piloted a streamlined Harley-Davidson 250cc Sprint and broke Class A and Class C world records at the Bonneville Salt Flats in Utah. He broke the record held by Stormy Mangham, who set a record of 156 miles per hour the previous year. Roeder achieved an average of 177 miles per hour. The vehicle that Roeder drove contained the 1966 engine that was still in the experimental stage. This record helped prove the engine’s power to the public.In 1934, 20 trial CAC motorcycles and 5 spare engines were developed by the factory race department, with the guidance of famed racer Joe Petrali to compete on the speedway circuit. Only a small number of these have known to survive as most were “used up” on the track. The Harley-Davidson Archives recently acquired one of these rare machines and it is now on display in the Museum.