Motocross Bikes
2003Yamaha YZ85
36 fields on record
The 2003 Yamaha YZ85 is a junior two-stroke motocross bike. Its liquid-cooled 84.7cc single drives through a six-speed gearbox and chain. An 864 mm seat, 70.8 kg wet weight and 4.9-litre tank make it a competitive, light machine for young racers.
- Capacity
- 84.7 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 66.0 kg
- Seat height
- 864 mm
- Power
- Not on record
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2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed purely for amateur motocross racing and off-road training on tracks scaled to junior riders.
- Built for
- A high-strung, free-revving two-stroke that rewards aggressive clutch and throttle work with sharp, flickable handling on rough terrain.
- Not ideal for
- This is not suitable for adult commuting, highway travel, two-up riding, or anyone seeking comfort, storage, or long-distance capability.
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
- Electric
- Ignition
- CDI
- Lubrication system
- Dry sump
- Power
- Not on record - add it
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, multiplate
Dimensions & weight
- Wheelbase
- 1255 mm
- Overall length
- 1818 mm
- Overall width
- 758 mm
- Overall height
- 1161 mm
- Seat height
- 864 mm
- Dry weight
- 66.0 kg
- Wet weight
- 70.8 kg
- Fuel capacity
- 4.90 litres
- Ground clearance
- 351 mm
Chassis & suspension
- Frame
- Aluminium
- Front suspension
- Telescopic fork
- Rear suspension
- Swinging arm (monocross)
- Front wheel travel
- 275 mm
- Rear wheel travel
- 282 mm
- Rake (fork angle)
- 26.0°
- Trail
- 89 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 220 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 190 mm
- Front tyre
- 70/100-17 40M
- Rear tyre
- 90/100-14 49M
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 | 66 kg | 66 kg | 66 kg | 66 kg | 66 kg | 66 kg |
| Seat height | 864 mm | 864 mm | 864 mm | 841 mm | 841 mm | 841 mm |
| Fuel capacity | 4.9 L | 4.9 L | 4.9 L | 4.9 L | 4.9 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 YZ85?
The 2003 Yamaha YZ85 has a Capacity of 84.7 ccm (5.17 cubic inches).
How many gears does the Yamaha YZ85 have?
The 2003 Yamaha YZ85 has a Gearbox of 6-speed.
How much does the Yamaha YZ85 weigh?
The 2003 Yamaha YZ85 has a Dry weight of 66.0 kg (145.5 pounds).
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