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
Osborn Engineering Company Osborn Engineering Company Osborn Engineering Company was a British manufacturer of motorcycles, which sold its machines under the OEC brand name. The company was founded by John Osborn in 1901, producing Minerva engined bikes. Later machines used a variety of engines from companies such as Blackburne, and JAP. In 1927 OEC introduced its first bike with the duplex steering system. The most famous model produced by the firm was the OEC Commander introduced in 1938, with a 500 cc single-cylinder Matchless engine and duplex steering. During the Second World War, OEC ceased motorcycle production to concentrate on war work. In