Across the 2007, 2008 and 2010 model years, the Yamaha YZ85 LW motorcycle has supplied wet/running weights ranging from 156.5 lb (71 kg) and dry weights ranging from 145.5 lb (66 kg), depending on model year.
Yamaha YZ85 LW weight overview
Its low overall mass should be most noticeable off the throttle: moving it by hand, backing out of a parking space and managing stop-start riding should take less effort than on a heavy road bike.
Very Light Motorcycle
How heavy is the Yamaha YZ85 LW?
wet weight
Using a model-level wet weight comparison, the Yamaha YZ85 LW is lighter than about 96.7% of 15 Yamaha motocross bikes 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 YZ85 LW weight & related specs
| Model years covered | 2007, 2008, 2010 |
|---|---|
| Wet / running weight | 156.5 lb (71 kg) |
| Dry weight | 145.5 lb (66 kg) |
| Engine displacement | 84.7 cc |
| Torque | 8.6 lb-ft (11.7 Nm) |
| Fuel capacity | 1.3 US gal (4.92 L) to 1.32 US gal (5 L) |
| Full-tank fuel weight (estimated) | 8.1 lb (3.7 kg) to 8.2 lb (3.7 kg) |
Weight changes by model year
The 2007 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
| Torque per 100 lb | 5.93 lb-ft / 100 lb |
|---|---|
| Displacement per pound | 0.54 cc / lb to 0.58 cc / lb |
| Weight per 100 cc | 171.8 lb / 100 cc to 184.8 lb / 100 cc |
| Fuel weight as % of bike weight | 5.2% to 5.6% |
| Weight with full tank | 153.7 lb (69.7 kg) |
What the weight numbers tell you
Yamaha YZ85 LW weight FAQ
What is the Yamaha YZ85 LW dry and wet weight?
Across the covered 2007, 2008, 2010 years, listed wet/running weight is 156.5 lb (71 kg) and listed dry weight is 145.5 lb (66 kg). Check the year-change section because the exact figure can vary by model year.
Is the Yamaha YZ85 LW lighter or heavier than other Yamaha motocross bikes?
It is comparatively light for this Yamaha category. The model lands near the 3rd percentile for weight in the compatible dataset.
Which Yamaha YZ85 LW years have different weight specs?
No clear weight change appears in the usable model-year data. Other specifications may still differ by year.
How much does a full tank add to the Yamaha YZ85 LW?
Based on the supplied 1.3 US gal (4.92 L) to 1.32 US gal (5 L) tank capacity, the gasoline itself weighs about 8.1 lb (3.7 kg) to 8.2 lb (3.7 kg) when full. This helps explain part of the difference between dry and ready-to-ride mass.
What is the combined Yamaha YZ85 LW and rider weight?
Using the model’s representative wet/running weight and a 180 lb rider, the combined bike-and-rider mass is about 336.5 lb (152.6 kg) before riding gear, luggage or a passenger.
What is the estimated Yamaha YZ85 LW weight with a full tank of gas?
Filling the listed tank brings the calculated bike weight to roughly 153.7 lb (69.7 kg). This estimate is most useful when no official wet/running figure is available.
How much of the Yamaha YZ85 LW total weight comes from fuel?
The calculated full-tank fuel mass is about 5.2% to 5.6% of the bike’s listed weight. This helps show why a dry-weight number can understate what you actually manage on the road.
How does Yamaha YZ85 LW torque compare with its weight?
Where compatible torque and weight figures are available, the model works out to 5.93 lb-ft per 100 lb. This gives more context than torque alone because it relates engine twist to the mass it has to move.
What is the Yamaha YZ85 LW engine-size-to-weight ratio?
The available figures work out to 0.54 cc per lb to 0.58 cc per lb. This is not a performance rating, but it is a useful way to compare engine size against total motorcycle mass.
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.