Yamaha YZ85 - 2009 Specifications and Reviews

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.

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General information

CategoryCross / motocross
Year2009
ModelYamaha YZ85
 
 

Engine and Transmission Specifications

ClutchWet, multiplate
Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
Fuel systemCarburettor. Keihin® PWK 28
Bore x stroke47.5 x 47.8 mm (1.9 x 1.9 inches)
Compression8.2:1
Stroke2
Engine typeSingle cylinder
Capacity:84.70 ccm (5.17 cubic inches)

Physical measures and capacities

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)
 
 

Yamaha YZ85 dimensions and frame

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 dimensions70/80-M17
Rear suspension travel282 mm (11.1 inches)
Rear suspensionSingle shock
Front suspension travel274 mm (10.8 inches)
Front suspensionInverted fork

Speed and acceleration

Color optionsBlue/white
Fuel capacity4.92 litres (1.30 gallons)

Other specs

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Rider Fit Visualizer

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 864mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with tip-toe one foot on the 2009 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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