Motocross Bikes
2009Yamaha YZ85
37 fields on record
The 2009 Yamaha YZ85 is a liquid-cooled 84cc motocross machine designed for young intermediate riders transitioning to larger machines. Known for its responsive single-cylinder engine, manageable 156-pound weight, and low 34-inch seat height, it delivers excellent handling and power delivery for aspiring racers. The YZ85 remains a popular choice for junior motocross competition and amateur off-road riding.
- Capacity
- 84.7 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 66.2 kg
- Seat height
- 864 mm
- Power
- Not on record
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2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing and track practice, not for trail riding, commuting, or general recreation.
- Built for
- A high-strung, rev-happy two-stroke that rewards aggressive clutch and throttle work with sharp, flickable handling on motocross tracks.
- Not ideal for
- Not for adult riders, highway use, long-distance touring, or anyone seeking a comfortable or forgiving first bike.
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
- 1257 mm
- Overall length
- 1821 mm
- Overall width
- 785 mm
- Overall height
- 1161 mm
- Seat height
- 864 mm
- Dry weight
- 66.2 kg
- Wet weight
- 70.8 kg
- Fuel capacity
- 4.90 litres
- Ground clearance
- 351 mm
Chassis & suspension
- Frame
- Aluminium
- Front suspension
- Inverted fork
- Rear suspension
- Single shock
- Front wheel travel
- 274 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
- 70/80-M17
- Rear tyre
- 90/90-M14
Other
- Color options
- Blue/white
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 | 2009 | 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 2009 Yamaha YZ85 has a Capacity of 84.7 ccm (5.17 cubic inches).
How many gears does the Yamaha YZ85 have?
The 2009 Yamaha YZ85 has a Gearbox of 6-speed.
How much does the Yamaha YZ85 weigh?
The 2009 Yamaha YZ85 has a Dry weight of 66.2 kg (145.9 pounds).
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