1970 Yamaha YAS 1 specifications
Available technical data for this model and year. Specifications can vary by market and version.
Technical specifications
| Displacement | 125.0 ccm (7.63 cubic inches) |
|---|---|
| Engine type | Twin, two-stroke |
| Power | 15.0 HP (10.9 kW )) @ 8500 RPM |
| Compression | 7.0:1 |
| Bore x stroke | 43.0 x 43.0 mm (1.7 x 1.7 inches) |
| Fuel control | Port control |
| Cooling system | Air |
| Gearbox | 5-speed |
| Transmission type | Chain (final drive) |
| Front brakes | Expanding brake |
| Rear brakes | Expanding brake |
| Front tyre | 2.50-18 |
| Rear tyre | 2.75-18 |
| Weight incl. oil, gas, etc | 105.0 kg (231.5 pounds) |
| Fuel capacity | 9.50 litres (2.51 US gallons) |
| Top speed | 110.0 km/h (68.4 mph) |
Source: Bikez: YAS 1, 1970. Retrieved 2026-09-19. Match confidence: exact.
Years listed are the entries held in this archive, rather than a complete production history.
Browse XVS to YP models and variants · Parts buying guide · Decals and graphics