For the 1970 model year, the Yamaha YAS 1 motorcycle has a listed wet/running weight of 231.5 lb (105 kg).
Yamaha YAS 1 weight overview
Its low overall mass should be most noticeable off the throttle: moving it by hand, backing out of a parking space and managing stop-start riding should take less effort than on a heavy road bike.
Very Light Motorcycle
How heavy is the Yamaha YAS 1?
wet weight
Using a model-level wet weight comparison, the Yamaha YAS 1 is lighter than about 82% of 197 Yamaha motorcycles with compatible weight data.
Ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Yamaha YAS 1 weight & related specs
| Model years covered | 1970 |
|---|---|
| Wet / running weight | 231.5 lb (105 kg) |
| Engine displacement | 125 cc |
| Fuel capacity | 2.51 US gal (9.5 L) |
| Full-tank fuel weight (estimated) | 15.6 lb (7.1 kg) |
Useful weight calculations
| Displacement per pound | 0.54 cc / lb |
|---|---|
| Weight per 100 cc | 185.2 lb / 100 cc |
| Fuel weight as % of bike weight | 6.7% |
What the weight numbers tell you
Yamaha YAS 1 weight FAQ
What is the Yamaha YAS 1 wet weight?
The supplied wet/running weight is 231.5 lb (105 kg) across the model years covered here. That figure is the most useful available number for real-world handling because operating fluids and fuel are included.
Is the Yamaha YAS 1 lighter or heavier than other Yamaha motorcycles?
It is comparatively light for this Yamaha category. The model lands near the 18th percentile for weight in the compatible dataset.
How much does a full tank add to the Yamaha YAS 1?
Based on the supplied 2.51 US gal (9.5 L) tank capacity, the gasoline itself weighs about 15.6 lb (7.1 kg) when full. On models with a wet/running weight, that fuel mass is already included in the listed ready-to-ride figure.
What is the combined Yamaha YAS 1 and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 411.5 lb (186.6 kg) before riding gear, luggage or a passenger.
What is the Yamaha YAS 1 displacement per pound?
The available figures work out to 0.54 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
What is the Yamaha YAS 1 weight difference versus the category median?
Compared with the median Yamaha motorcycle weight of 375 lb (170.1 kg), the model is roughly 143.5 lb (65.1 kg) lighter.
Where will I notice the Yamaha YAS 1 weight most?
The weight itself is unlikely to be the main difficulty. Rider reach, steering lock and where the mass sits may matter more at walking pace.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Yamaha Motorsports website.