For the 1980 model year, the Yamaha XS 400 US. Custom motorcycle has a listed wet/running weight of 396.8 lb (180 kg).
Yamaha XS 400 US. Custom weight overview
This is neither unusually light nor extremely heavy. For most riders the practical weight question is more about seat height, center of mass and low-speed balance than the scale number alone.
Middleweight Motorcycle
How heavy is the Yamaha XS 400 US. Custom?
wet weight
Using a model-level wet weight comparison, the Yamaha XS 400 US. Custom is heavier than about 63.2% of 34 Yamaha classic 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 XS 400 US. Custom weight & related specs
| Model years covered | 1980 |
|---|---|
| Wet / running weight | 396.8 lb (180 kg) |
| Engine displacement | 392 cc |
| Power | 27 hp |
| Fuel capacity | 3.7 US gal (14 L) |
| Full-tank fuel weight (estimated) | 23 lb (10.4 kg) |
Useful weight calculations
| Horsepower per 100 lb | 6.8 hp / 100 lb |
|---|---|
| Pounds per horsepower | 14.7 lb / hp |
| Displacement per pound | 0.99 cc / lb |
| Weight per 100 cc | 101.2 lb / 100 cc |
| Fuel weight as % of bike weight | 5.8% |
What the weight numbers tell you
Yamaha XS 400 US. Custom weight FAQ
How heavy is the Yamaha XS 400 US. Custom ready to ride?
Listed ready-to-ride weight is 396.8 lb (180 kg).
Is the Yamaha XS 400 US. Custom heavy compared with other Yamaha classic motorcycles?
It sits fairly close to the middle of the category. Its representative wet weight is around the 63rd percentile among 34 compatible Yamaha classic motorcycles.
How much does the Yamaha XS 400 US. Custom fuel weigh?
The listed tank capacity is 3.7 US gal (14 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 23 lb (10.4 kg). That is an estimate for fuel mass, not an official Yamaha curb-weight calculation.
How heavy is the Yamaha XS 400 US. Custom with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 576.8 lb (261.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Yamaha XS 400 US. Custom have per 100 lb?
Where compatible power and weight figures are available, it works out to 6.8 hp per 100 lb. That places it around the 23rd percentile within the compatible Yamaha classic power-to-weight comparison.
How many cc does the Yamaha XS 400 US. Custom have per pound?
Engine displacement relative to bike weight is 0.99 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
How does the Yamaha XS 400 US. Custom compare with the median Yamaha classic motorcycle weight?
The model sits about 20.9 lb (9.5 kg) heavier than the compatible median Yamaha classic motorcycle weight used on this page.
Will the Yamaha XS 400 US. Custom feel heavy at low speed?
It is most likely to feel heavy while stopped, backing up or on a slope rather than once settled at normal riding speed. Seat height and center of gravity matter a lot.
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.