(1961 / Production Model)
This model followed the 125cc YA-3 as the 4th model of the YA series. Engineered for good drivability in the low- to mid-speed range, the engine newly adopted a rotary disc valve intake. Other features like a seesaw type rotary shift pedal and a telescopic front fork improved operability and comfort, and its exterior design was redone to give it a completely new sporty image.
- Overall length × width × height: 1,870mm × 680mm × 955mm
- Weight: 110kg
- Engine type: Air-cooled, 2-stroke, single-cylinder, 123cm³
- Maximum power output: 7.4kW (10.0PS) / 6,500r/min
- Maximum torque: 11.8N･m (1.2kgf･m) / 4,500r/min
- Price: ¥130,000
*All figures, etc. in a model's description or specifications are from when the model was originally released.