(1967 / Production Model)
This was Yamaha Motor's first 125cc 2-cylinder sports model. It employed Yamaha's first 5-port (jet port) engine that added two auxiliary scavenging ports to the previous 3-port (intake, scavenging, exhaust) system to improve exhaust efficiency. It was also equipped with twin carburetors, the "Autolube" separate oil supply system and a return type 5-speed transmission for outstanding running performance. There were also standard models suitable for business-use and scrambler models with high-mount mufflers available.
- Overall length × width × height: 1,855mm × 740mm × 1,070mm
- Weight: 98kg
- Engine type: Air-cooled, 2-stroke, in-line 2-cylinder, 124cm³
- Maximum power output: 11.0kW (15.0PS) / 8,500r/min
- Maximum torque: 12.7N･m (1.3kgf･m) / 8,000r/min
- Price: ¥137,000
*All figures, etc. in a model's description or specifications are from when the model was originally released.