The YamahaYD1 was Yamaha's first racing motorcycle, built for participation in the 2nd Asama Highlands Race in 1957. The YD1 was equipped with a 247...
manufactured by Yamaha; it was a 175 cc single cylinder two-stroke. YD-1 (1957) Yamaha began production of its first 250 cc, two-stroke twin, the YD1. MF-1 (1958)...