Across the 2009, 2010 and 2012 model years, the Yamaha Big Bear 400 4×4 IRS motorcycle has supplied wet/running weights ranging from 628.1 lb (284.9 kg) and dry weights ranging from 593 lb (269 kg), depending on model year.
Yamaha Big Bear 400 4×4 IRS weight overview
This sits in heavyweight territory. Riders should think about garage movement, backing up, surface slope and passenger/luggage load as much as the on-road feel.
Very Heavy Motorcycle
How heavy is the Yamaha Big Bear 400 4×4 IRS?
wet weight
Using a model-level wet weight comparison, the Yamaha Big Bear 400 4×4 IRS is lighter than about 53.2% of 62 Yamaha ATVs 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 Big Bear 400 4×4 IRS weight & related specs
| Model years covered | 2009, 2010, 2012 |
|---|---|
| Wet / running weight | 628.1 lb (284.9 kg) |
| Dry weight | 593 lb (269 kg) |
| Engine displacement | 386 cc to 421 cc |
| Fuel capacity | 4 US gal (15.14 L) |
| Full-tank fuel weight (estimated) | 24.9 lb (11.3 kg) |
Weight changes by model year
Useful weight calculations
| Displacement per pound | 0.61 cc / lb to 0.67 cc / lb |
|---|---|
| Weight per 100 cc | 149.2 lb / 100 cc to 162.7 lb / 100 cc |
| Fuel weight as % of bike weight | 4% to 4.2% |
| Weight with full tank | 617.9 lb (280.3 kg) |
What the weight numbers tell you
Yamaha Big Bear 400 4×4 IRS weight FAQ
What does the Yamaha Big Bear 400 4×4 IRS weigh ready to ride?
The supplied figures span 628.1 lb (284.9 kg) for wet/running weight and 593 lb (269 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 Big Bear 400 4×4 IRS heavy compared with other Yamaha ATVs?
It sits fairly close to the middle of the category. Its representative wet weight is around the 47th percentile among 62 compatible Yamaha ATVs.
Does the Yamaha Big Bear 400 4×4 IRS weight change by model year?
Not in the usable weight data on this page. Across the covered 2009, 2010, 2012 years, the supplied weight figure remains the same where comparable values are available.
How much does the Yamaha Big Bear 400 4×4 IRS fuel weigh?
The listed tank capacity is 4 US gal (15.14 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 24.9 lb (11.3 kg). That is an estimate for fuel mass, not an official Yamaha curb-weight calculation.
How heavy is the Yamaha Big Bear 400 4×4 IRS with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 808.1 lb (366.5 kg) using the representative wet/running figure. Gear and luggage would add more.
What is the Yamaha Big Bear 400 4×4 IRS full-tank weight estimate?
Based on the available dry-weight and tank-capacity data, a full-tank estimate is 617.9 lb (280.3 kg). Oil, coolant and market-specific equipment can still make actual ready-to-ride weight different.
What is the Yamaha Big Bear 400 4×4 IRS displacement per pound?
Engine displacement relative to bike weight is 0.61 cc per lb to 0.67 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
How much does Yamaha Big Bear 400 4×4 IRS weight vary by year?
The usable year data ranges from 593 lb (269 kg) in 2009 to 628.1 lb (284.9 kg) in 2010, 2012.
What is the Yamaha Big Bear 400 4×4 IRS weight difference versus the category median?
The model sits about 14.4 lb (6.6 kg) lighter than the compatible median Yamaha ATV 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.