Motocross Bikes
2021Yamaha YZ85LW
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The 2021 Yamaha YZ85LW is a large-wheel youth motocross bike for taller young riders. Its liquid-cooled 85cc two-stroke single drives a six-speed gearbox and chain. A 904 mm seat and 73 kg wet weight make it a strong step towards full-size machines.
- Capacity
- 85.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 66.0 kg
- Seat height
- 904 mm
- Power
- Not on record
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Other years
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2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It is a dedicated amateur motocross competition bike designed for closed-course tracks, not a general-purpose or road-legal machine.
- Built for
- The 2-stroke engine and lightweight chassis reward an aggressive, high-revving riding style with sharp, flickable handling on jumps and tight turns.
- Not ideal for
- This is not suitable for adult riders, street use, touring, commuting, or anyone seeking a comfortable, low-maintenance everyday vehicle.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 85.0 ccm
- Engine type
- Single, two-stroke
- Bore x stroke
- 47.5 x 47.8 mm
- Compression
- 8.2:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- CDI
- Lubrication system
- Premix
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multiple-disc coil spring
Dimensions & weight
- Wheelbase
- 1286 mm
- Overall length
- 1903 mm
- Overall width
- 757 mm
- Overall height
- 1161 mm
- Seat height
- 904 mm
- Dry weight
- 66.0 kg
- Wet weight
- 73.0 kg
- Fuel capacity
- 5.00 litres
- Ground clearance
- 393 mm
- Oil capacity
- 0.50 litres
Chassis & suspension
- Frame
- Aluminium. Semi double cradle.
- Front suspension
- Upside-down telescopic fork
- Rear suspension
- Swingarm (link suspension)
- Front wheel travel
- 274 mm
- Rear wheel travel
- 282 mm
- Rake (fork angle)
- 27.0°
- Trail
- 106 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 220 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 190 mm
- Front tyre
- 70/100-19
- Rear tyre
- 90/100-16
Other
- Color options
- Blue/White
- Comments
- LW is an abbreviation for Large Wheels.
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2002 | 2008 | 2015 | 2021 | 2027 |
|---|---|---|---|---|---|
| Capacity | 85 cc | 85 cc | 85 cc | 85 cc | 85 cc |
| Dry weight | 69 kg | 66 kg | 66 kg | 66 kg | 66 kg |
| Seat height | 902 mm | 864 mm | 904 mm | 904 mm | 884 mm |
| Fuel capacity | 5 L | 5 L | 5 L | 5 L | 4.9 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha YZ85LW?
The 2021 Yamaha YZ85LW has a Capacity of 85.0 ccm (5.19 cubic inches).
How many gears does the Yamaha YZ85LW have?
The 2021 Yamaha YZ85LW has a Gearbox of 6-speed.
How much does the Yamaha YZ85LW weigh?
The 2021 Yamaha YZ85LW has a Dry weight of 66.0 kg (145.5 pounds).
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