Across 5 covered model years from 1975 to 1981, the Yamaha RS 100 motorcycle has supplied wet/running weights ranging from 231.5 lb (105 kg) to 233.7 lb (106 kg).
Yamaha RS 100 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 RS 100?
wet weight
Using a model-level wet weight comparison, the Yamaha RS 100 is lighter than about 92.6% of 34 Yamaha classic motorcycles with compatible weight data.
Ready-to-ride weight range
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Yamaha RS 100 weight & related specs
| Model years covered | 1975, 1978, 1979, 1980, 1981 |
|---|---|
| Wet / running weight | 231.5 lb (105 kg) to 233.7 lb (106 kg) |
| Engine displacement | 97 cc |
| Power | 10 hp |
| Torque | 6.6 lb-ft (9 Nm) |
| Fuel capacity | 2.38 US gal (9 L) |
| Full-tank fuel weight (estimated) | 14.8 lb (6.7 kg) |
Weight changes by model year
The 1975 model is used as the baseline where data is available. Only later supplied values that differ are shown below. A year pill does not mean every individual weight field was supplied for that year.
Useful weight calculations
| Horsepower per 100 lb | 4.28 hp / 100 lb |
|---|---|
| Pounds per horsepower | 23.37 lb / hp |
| Torque per 100 lb | 2.87 lb-ft / 100 lb |
| Displacement per pound | 0.42 cc / lb |
| Weight per 100 cc | 238.6 lb / 100 cc to 240.9 lb / 100 cc |
| Fuel weight as % of bike weight | 6.3% to 6.4% |
What the weight numbers tell you
Yamaha RS 100 weight FAQ
What is the Yamaha RS 100 wet weight?
The supplied wet/running weight is 231.5 lb (105 kg) to 233.7 lb (106 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 RS 100 lighter or heavier than other Yamaha classic motorcycles?
It is comparatively light for this Yamaha category. The model lands near the 7th percentile for weight in the compatible dataset.
Which Yamaha RS 100 years have different weight specs?
The supplied data shows different weight figures across the 1975, 1978, 1979, 1980, 1981 model years. Use the year-specific changes section above for the exact value attached to each changed year.
How much does a full tank add to the Yamaha RS 100?
Based on the supplied 2.38 US gal (9 L) tank capacity, the gasoline itself weighs about 14.8 lb (6.7 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 RS 100 and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 413.7 lb (187.6 kg) before riding gear, luggage or a passenger.
What is the Yamaha RS 100 power-to-weight ratio?
Available model-year data produces 4.28 hp per 100 lb. It shows engine output relative to motorcycle mass rather than just quoting peak horsepower. That places it around the 2nd percentile within the compatible Yamaha classic power-to-weight comparison.
How much torque does the Yamaha RS 100 have per 100 lb?
Where compatible torque and weight figures are available, the model works out to 2.87 lb-ft per 100 lb. This gives more context than torque alone because it relates engine twist to the mass it has to move.
What is the Yamaha RS 100 displacement per pound?
The available figures work out to 0.42 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
How much does Yamaha RS 100 weight vary by year?
Among years with usable comparable figures, 1975 is the lightest at 231.5 lb (105 kg), while 1978-1981 is the heaviest at 233.7 lb (106 kg).
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.