Across the 2009 and 2010 model years, the Yamaha Grizzly 450 Auto 4×4 IRS motorcycle has supplied wet/running weights ranging from 628.1 lb (284.9 kg) and dry weights ranging from 590 lb (267.6 kg), depending on model year.
Yamaha Grizzly 450 Auto 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 Grizzly 450 Auto 4×4 IRS?
wet weight
Using a model-level wet weight comparison, the Yamaha Grizzly 450 Auto 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 Grizzly 450 Auto 4×4 IRS weight & related specs
| Model years covered | 2009, 2010 |
|---|---|
| Wet / running weight | 628.1 lb (284.9 kg) |
| Dry weight | 590 lb (267.6 kg) |
| Engine displacement | 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 | 0.67 cc / lb to 0.71 cc / lb |
|---|---|
| Weight per 100 cc | 140.1 lb / 100 cc to 149.2 lb / 100 cc |
| Fuel weight as % of bike weight | 4% to 4.2% |
| Weight with full tank | 614.8 lb (278.9 kg) |
What the weight numbers tell you
Yamaha Grizzly 450 Auto 4×4 IRS weight FAQ
What does the Yamaha Grizzly 450 Auto 4×4 IRS weigh ready to ride?
The supplied figures span 628.1 lb (284.9 kg) for wet/running weight and 590 lb (267.6 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 Grizzly 450 Auto 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 Grizzly 450 Auto 4×4 IRS weight change by model year?
Not in the usable weight data on this page. Across the covered 2009-2010 years, the supplied weight figure remains the same where comparable values are available.
How much does the Yamaha Grizzly 450 Auto 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 Grizzly 450 Auto 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 Grizzly 450 Auto 4×4 IRS full-tank weight estimate?
Filling the listed tank brings the calculated bike weight to roughly 614.8 lb (278.9 kg). This estimate is most useful when no official wet/running figure is available.
How much of the Yamaha Grizzly 450 Auto 4×4 IRS total weight comes from fuel?
Based on the available weight basis, a full tank of gasoline represents about 4% to 4.2% of the motorcycle’s weight.
What is the Yamaha Grizzly 450 Auto 4×4 IRS engine-size-to-weight ratio?
Engine displacement relative to bike weight is 0.67 cc per lb to 0.71 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
How far is the Yamaha Grizzly 450 Auto 4×4 IRS from the median Yamaha ATV weight?
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.