For the 1981 model year, the Yamaha XS 400 Special motorcycle has a listed wet/running weight of 396.8 lb (180 kg).
Yamaha XS 400 Special weight overview
This is middleweight territory: substantial enough to feel planted, but still well short of heavyweight touring and large-cruiser mass.
Middleweight Motorcycle
How heavy is the Yamaha XS 400 Special?
wet weight
Using a model-level wet weight comparison, the Yamaha XS 400 Special is heavier than about 55.3% 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 XS 400 Special weight & related specs
| Model years covered | 1981 |
|---|---|
| Wet / running weight | 396.8 lb (180 kg) |
| Engine displacement | 392 cc |
| Torque | 23.8 lb-ft (32.3 Nm) |
| Fuel capacity | 3.7 US gal (14 L) |
| Full-tank fuel weight (estimated) | 23 lb (10.4 kg) |
Useful weight calculations
| Torque per 100 lb | 6 lb-ft / 100 lb |
|---|---|
| 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 Special weight FAQ
How much does the Yamaha XS 400 Special weigh?
The available wet/running figure is 396.8 lb (180 kg). This is more representative of the motorcycle you actually push, park and ride than a dry-only specification.
How does the Yamaha XS 400 Special weight compare with similar Yamahas?
It is not an extreme outlier for the category. The model ranks around the 55th percentile for weight among 197 compatible Yamaha motorcycles.
What does a full tank of gas weigh on the Yamaha XS 400 Special?
A full tank works out to about 23 lb (10.4 kg) from the listed 3.7 US gal (14 L) capacity. Actual fuel density varies slightly, so treat it as a practical estimate.
What does the Yamaha XS 400 Special weigh with a 180 lb rider?
The approximate combined total is 576.8 lb (261.6 kg) with a 180 lb rider, based on the representative wet/running weight used on this page.
What is the Yamaha XS 400 Special torque per 100 lb of bike weight?
Available data gives 6 lb-ft per 100 lb. That ratio helps explain how strong the engine is relative to the bike’s mass, especially at lower speeds.
How many cc does the Yamaha XS 400 Special have per pound?
The model has about 0.99 cc per lb in the available data. This simply shows how much engine displacement there is for each pound of motorcycle weight.
How does the Yamaha XS 400 Special compare with the median Yamaha motorcycle weight?
The representative wet weight is about 21.8 lb (9.9 kg) heavier than the median Yamaha motorcycle weight of 375 lb (170.1 kg) in this dataset.
Is the Yamaha XS 400 Special easy to move around by hand?
The number is manageable for a road bike, but you still notice it when parking, making tight low-speed turns or catching a lean. On the move, chassis balance can make it feel lighter than the scale suggests.
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.