The Yamaha YAS1 motorcycle specifications include a 125 cc (7.63 cu in) engine.
Key specifications
How the Yamaha YAS1 compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 77% lower than the Yamaha database average. Around the 25th percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
125 cc — larger displacement than about 25% of Yamaha models.
Mechanical overview
Additional useful specifications
| Front tire size | 2.25-17 |
|---|---|
| Rear tire size | 2.50-17 |
Model information
| Year released | 1971 |
|---|---|
| Category | Classic |
Engine specifications
| Engine type | Twin, two-stroke |
|---|---|
| Displacement | 125 cc (7.63 cu in) |
| Cooling system | Air |
| Fuel system | Carburettor |
Transmission and drivetrain
| Final drive | Chain (final drive) |
|---|
Brakes, wheels and tires
| Rear brakes | Expanding brake (drum brake) |
|---|---|
| Front tire | 2.25-17 |
| Rear tire | 2.50-17 |
Other specifications
| Exhaust system | Double stainless steel pipes |
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Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.