Motocross Bikes
2003Yamaha YZ85LW
37 fields on record
The 2003 Yamaha YZ85LW is the large-wheel version of Yamaha's junior two-stroke motocross bike. Its liquid-cooled 84.7cc single drives through a six-speed gearbox and chain. A 902 mm seat, 71 kg wet weight and 5-litre tank suit taller young racers.
- Capacity
- 84.7 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 69.0 kg
- Seat height
- 902 mm
- Power
- Not on record
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Other years
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2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing on closed off-road tracks, note this is the larger-wheel (LW) variant aimed at bigger junior riders stepping up before a full-size bike.
- Built for
- A high-revving, agile, purpose-built racer that rewards aggressive, committed riding and rapid direction changes over jumps and berms.
- Not ideal for
- This is not suitable for road use, commuting, touring, carrying a passenger, or riders looking for a comfortable, low-maintenance everyday machine.
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
- 84.7 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
- 1278 mm
- Overall length
- 1896 mm
- Overall width
- 758 mm
- Overall height
- 1204 mm
- Seat height
- 902 mm
- Dry weight
- 69.0 kg
- Wet weight
- 71.0 kg
- Fuel capacity
- 5.00 litres
- Ground clearance
- 391 mm
- Oil capacity
- 0.50 litres
Chassis & suspension
- Frame
- Semi-double cradle
- Front suspension
- Telescopic fork
- Rear suspension
- Swinging arm (monocross)
- Front wheel travel
- 275 mm
- Rear wheel travel
- 287 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 42M
- Rear tyre
- 90/100-16 52M
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 | 2003 | 2008 | 2015 | 2021 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 85 cc | 85 cc | 85 cc | 85 cc | 85 cc | 85 cc |
| Dry weight | 69 kg | 69 kg | 66 kg | 66 kg | 66 kg | 66 kg |
| Seat height | 902 mm | 902 mm | 864 mm | 904 mm | 904 mm | 884 mm |
| Fuel capacity | 5 L | 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 2003 Yamaha YZ85LW has a Capacity of 84.7 ccm (5.17 cubic inches).
How many gears does the Yamaha YZ85LW have?
The 2003 Yamaha YZ85LW has a Gearbox of 6-speed.
How much does the Yamaha YZ85LW weigh?
The 2003 Yamaha YZ85LW has a Dry weight of 69.0 kg (152.1 pounds).
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