(1959 / Production Model)
Born as a further development of the YD-1 and YD Racer that participated in the 2nd Asama Highlands Race, this new model mounted a 2-stroke, 2-cylinder 20 hp engine on a steel-pipe cradle frame with features including the first Japanese-made 5-speed transmission and a combination type instrument panel with engine tachometer. As a high-performance sports model that could be outfitted with an abundant offering of race kit parts, it became a leading performer in a variety of categories of both on- and off-road competition.
- Overall length × width × height: 1,990mm × 615mm × 950mm
- Weight: 138kg
- Engine type: Air-cooled, 2-stroke, in-line 2-cylinder, 246cm³
- Maximum power output: 14.7kW (20.0PS) / 7,500r/min
- Maximum torque: 18.6N･m (1.9kgf･m) / 6,000r/min
- Price: ¥185,000
*All figures, etc. in a model's description or specifications are from when the model was originally released.