Rikuo Motorcycle of the Harley-Davidson, started production in 1929. In 1931 Dabittoson Harley Motorcycle Co., Ltd. was established in Japan. Dabittoson started domestic production of the Harley-Davidson Road King Motorcycle. The 4-cycle, 1200 cc, side-valve V-twin engine produces 28 horsepower for a top speed of 97 km per hour. The Road King motorcycle was improved and produced by Lin Ritsukawa, and Tsui Meguro under the Tokyu Kogyo Kurogane Company during World War II. This included the Type 97 military motorcycle which was often produced with a sidecar, called they Harley-Davidson, through the efforts of Alfred Rich Child, shipped tooling and personnel to
Curtiss V-8 motorcycle Motor Cycle", the first of over 100 books in the Tom Swift series, was published shortly after the V-8 record setting run. The record setting V-8 motorcycle is now in the Smithsonian's National Air and Space Museum. The Air and Space museum lent it to the Guggenheim for the 1998 "The Art of the Motorcycle" exhibition in New York. The Curtiss OX-5 aero engine, a successor of the V-8 motorcycle engine, powered several United States civilian and military aircraft. More than 10,000 were manufactured. Curtiss V-8 motorcycle The Curtiss V-8 motorcycle was a V8 engine-powered motorcycle designed and built by