Across the 1982 and 1983 model years, the Yamaha XS 400 SE motorcycle has a listed wet/running weight of 392.4 lb (178 kg).
Yamaha XS 400 SE 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 SE?
wet weight
Using a model-level wet weight comparison, the Yamaha XS 400 SE is lighter than about 64.5% of 69 Yamaha naked bikes 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 SE weight & related specs
| Model years covered | 1982, 1983 |
|---|---|
| Wet / running weight | 392.4 lb (178 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) |
Weight changes by model year
Useful weight calculations
| Horsepower per 100 lb | 6.88 hp / 100 lb |
|---|---|
| Pounds per horsepower | 14.53 lb / hp |
| Displacement per pound | 1 cc / lb |
| Weight per 100 cc | 100.1 lb / 100 cc |
| Fuel weight as % of bike weight | 5.9% |
What the weight numbers tell you
Yamaha XS 400 SE weight FAQ
How heavy is the Yamaha XS 400 SE ready to ride?
Listed ready-to-ride weight is 392.4 lb (178 kg). The year-specific section above shows which years use each figure where the supplied value changes.
Is the Yamaha XS 400 SE heavy compared with other Yamaha naked bikes?
It sits fairly close to the middle of the category. Its representative wet weight is around the 36th percentile among 69 compatible Yamaha naked bikes.
Does the Yamaha XS 400 SE weight change by model year?
Not in the usable weight data on this page. Across the covered 1982-1983 years, the supplied weight figure remains the same where comparable values are available.
How much does the Yamaha XS 400 SE 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 SE with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 572.4 lb (259.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Yamaha XS 400 SE have per 100 lb?
Where compatible power and weight figures are available, it works out to 6.88 hp per 100 lb. That places it around the 27th percentile within the compatible Yamaha naked bike power-to-weight comparison.
How much of the Yamaha XS 400 SE total weight comes from fuel?
Based on the available weight basis, a full tank of gasoline represents about 5.9% of the motorcycle’s weight.
What is the Yamaha XS 400 SE engine-size-to-weight ratio?
Engine displacement relative to bike weight is 1 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
How far is the Yamaha XS 400 SE from the median Yamaha naked bike weight?
The model sits about 26.5 lb (12 kg) lighter than the compatible median Yamaha naked bike weight used on this page.
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.