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Yamaha YAS 13.44 average rating for 2 Yamaha YAS 1 model variants. | 
| Yamaha YAS 1 model overview | 
| Yamaha YAS 1 models include the 2 motorcycles below produced from 1970 to 1971. The 1971 Yamaha YAS1 motorcycle is used as an example on this page. It has a 125 ccm twin engine. The category is classic. Our visitor's rating for this model is 3.4 out of 5 with 4 votes. See the model variants below for more rating details. | 
| Engine and transmission | |
|---|---|
| Displacement | 125.0 ccm (7.63 cubic inches) | 
| Exhaust system | Double stainless steel pipes | 
| Frame, dampers, brakes and wheels | |
| Front tire | 2.25-17 | 
| Rear tire | 2.50-17 | 
| Rear brakes | Expanding brake (drum brake) | 
| Weight and dimentions | |
| Other information | |
| Maintenance | Find Yamaha YAS 1 parts, fluids and service manuals. | 
| Insurance costs | Easy comparison of quotes from US top insurance providers. | 
The Yamaha YAS 1 model variants with detailed specs:
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 1971 Yamaha YAS1 Engine: 125.00 ccm ![]() Specs and pictures Detailed rating Add a comment Add your rating  | |
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 1970 Yamaha YAS 1 Power: 15.00 HP ![]() Wet weight: 105.00 kg ![]() Specs and pictures Detailed rating Add a comment Add your rating  | 
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