Yamaha YZ85 - 2010 Specifications and Reviews

The 2010 Yamaha YZ85 is a lightweight two-stroke motocross machine designed for young and intermediate riders transitioning through competition ranks. Known for its responsive 84cc engine and nimble handling characteristics, it delivers impressive power-to-weight ratio and agility on the track. The liquid-cooled powerplant and modern inverted fork suspension provide the performance needed for serious junior motocross competition.

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General information

CategoryCross / motocross
Year2010
ModelYamaha YZ85

Engine and Transmission Specifications

Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
IgnitionCDI
Fuel systemCarburettor. Keihin™ PWK 28
Bore x stroke47.5 x 47.8 mm (1.9 x 1.9 inches)
Compression8.2:1
Engine typeSingle cylinder, two-stroke
Capacity:84.70 ccm (5.17 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc
Front brakes diameter220 mm (8.7 inches)
Front brakesSingle disc
Rear tyre dimensions90/90-M14
Front tyre dimensions70/100-M17
Rear suspension travel282 mm (11.1 inches)
Rear suspensionSingle shock
Front suspension travel274 mm (10.8 inches)
Front suspensionInverted fork
 
 

Physical measures and capacities

Fuel capacity4.92 litres (1.30 gallons)
Wheelbase1,257 mm (49.5 inches)
Ground clearance351 mm (13.8 inches)
Overall width785 mm (30.9 inches)
Overall length1,821 mm (71.7 inches)
Overall height1,161 mm (45.7 inches)
Seat height864 mm (34.0 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc70.8 kg (156.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsTeam Yamaha Blue/White

Rider Fit Visualizer

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Feet:

At 864mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with tip-toe one foot on the 2010 Yamaha YZ85, with a cramped knee angle of around 75 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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