Across 6 covered model years from 2011 to 2019, the Yamaha SR400 motorcycle has supplied wet/running weights ranging from 383.6 lb (174 kg) to 384 lb (174.2 kg) and dry weights ranging from 288.8 lb (131 kg), depending on model year.
Yamaha SR400 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 SR400?
wet weight
Using a model-level wet weight comparison, the Yamaha SR400 is heavier than about 53.6% of 28 Yamaha allround models with compatible weight data.
Dry vs 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 SR400 weight & related specs
| Model years covered | 2011, 2015, 2016, 2017, 2018, 2019 |
|---|---|
| Wet / running weight | 383.6 lb (174 kg) to 384 lb (174.2 kg) |
| Dry weight | 288.8 lb (131 kg) |
| Engine displacement | 399 cc |
| Power | 22.9 hp |
| Torque | 20.2 lb-ft (27.4 Nm) to 45.7 lb-ft (62 Nm) |
| Fuel capacity | 3.17 US gal (12 L) to 3.2 US gal (12.11 L) |
| Full-tank fuel weight (estimated) | 19.7 lb (8.9 kg) to 19.9 lb (9 kg) |
Weight changes by model year
The 2011 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 | 5.96 hp / 100 lb |
|---|---|
| Pounds per horsepower | 16.77 lb / hp |
| Torque per 100 lb | 5.26 lb-ft / 100 lb to 15.83 lb-ft / 100 lb |
| Displacement per pound | 1.04 cc / lb to 1.38 cc / lb |
| Weight per 100 cc | 72.4 lb / 100 cc to 96.3 lb / 100 cc |
| Fuel weight as % of bike weight | 5.1% to 6.8% |
| Weight with full tank | 308.5 lb (139.9 kg) |
What the weight numbers tell you
Yamaha SR400 weight FAQ
What does the Yamaha SR400 weigh ready to ride?
The supplied figures span 383.6 lb (174 kg) to 384 lb (174.2 kg) for wet/running weight and 288.8 lb (131 kg) for dry weight across the years in this page. Wet weight is the better guide to what you actually manage on the road.
Is the Yamaha SR400 heavy compared with other Yamaha allround models?
It sits fairly close to the middle of the category. Its representative wet weight is around the 54th percentile among 28 compatible Yamaha allround models.
Does the Yamaha SR400 weight change by model year?
Not every covered year uses the same figure. The page groups identical values together and lists the later model years where the supplied weight specification changes.
How much does the Yamaha SR400 fuel weigh?
The listed tank capacity is 3.17 US gal (12 L) to 3.2 US gal (12.11 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 19.7 lb (8.9 kg) to 19.9 lb (9 kg). That is an estimate for fuel mass, not an official Yamaha curb-weight calculation.
How heavy is the Yamaha SR400 with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 564 lb (255.8 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Yamaha SR400 have per 100 lb?
Where compatible power and weight figures are available, it works out to 5.96 hp per 100 lb. That places it around the 29th percentile within the compatible Yamaha allround power-to-weight comparison.
What is the estimated Yamaha SR400 weight with a full tank of gas?
The page calculates about 308.5 lb (139.9 kg) with a full tank by adding the listed fuel mass to the dry figure. Treat this as a practical estimate, not an official Yamaha curb-weight number.
What is the Yamaha SR400 torque-to-weight ratio?
The calculated torque-to-weight range is 5.26 lb-ft per 100 lb to 15.83 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
How large is the Yamaha SR400 engine for its weight?
Engine displacement relative to bike weight is 1.04 cc per lb to 1.38 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
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.