Manufacturer | Yamaha |
---|---|
Production | 87-93 |
Engine | 49.3cc 2-stroke, single cylinder, air-cooled with reed valve |
Bore / Stroke | 40.0mm x 39.2mm |
Compression ratio | 7.4:1 |
Horse Power | 7 horsepower @ 8,800 RPM |
Torque | 0.59 kg-m @ 8,500 RPM |
Fuel system | Carburetor, Mikuni VM16SH |
Sparkplug | NGK B8HS '87-93 |
Battery | YUASA 6N4-2A-2 '87-93 |
Transmission | 5-speed constant mesh |
Front Tire | 3.50-12 '87-93 |
Rear Tire | 4.00-12 '87-93 |
Wheelbase | 1050mm |
Dimensions | L 1575mm W 635mm H 930mm |
Seat height | 650mm |
Weight | 75kg |
Related | Yamaha RX50 (contained same engine), Yamaha YSR85 |
Manuals | Service Manual |
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History
Yamaha YSR 80 and YSR 50 sport models goes on sale in Japan in 1986, and had the look of a re-shaped, scaled-down YZR500 factory racer that appealed to the spirit of race enthusiasts. The 2-stroke single-cylinder engine had a maximum output of 7 ps for the 50cc and 8.8 ps for the 80cc, a return type 5-speed transmission, front disc brake and other features to offer full-fledged sport riding potential. It became a standard in the mini-bike races popular at the time. 1992 was the last year of production, and the price was 189.000 yen for the 50cc and 211.000 yen for the 80cc.