Yamaha YZ85 - 2015 Specifications and Reviews

The 2015 Yamaha YZ85 is a lightweight 85cc two-stroke dirt bike designed for young riders transitioning from smaller machines. Known for its compact wheelbase, nimble handling, and reliable liquid-cooled engine, it delivers impressive performance for amateur motocross and trail riding. The electric starter and manageable seat height make it accessible for developing young competitors.

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General information

CategoryCross / motocross
Year2015
ModelYamaha YZ85
 
 

Engine and Transmission Specifications

ClutchMultiplate
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 detailsReed-valve-inducted
Engine typeSingle cylinder, two-stroke

Brakes, suspension, Frame and wheels

Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc. Hydraulic.
Front brakes diameter220 mm (8.7 inches)
Front brakesSingle disc. Hydraulic.
Rear tyre90/100-14
Front tyre70/100-17
Rear wheel travel282 mm (11.1 inches)
Rear SuspensionSingle shock
Front wheel travel274 mm (10.8 inches)
Front SuspensionInverted fork
Rake (fork angle)28.0°
 
 

Physical measures and capacities

Fuel capacity4.92 litres (1.30 gallons)
Wheelbase1,257 mm (49.5 inches)
Ground clearance330 mm (13.0 inches)
Overall width759 mm (29.9 inches)
Overall length1,821 mm (71.7 inches)
Overall height1,125 mm (44.3 inches)
Seat height841 mm (33.1 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc71.2 kg (157.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Factory warranty30 Day Limited Factory Warranty
StarterElectric
Color optionsTeam Yamaha Blue/White

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering90%
Daily Riding5%
Touring3%
Passenger0%

Rider Profile

Best ForThis is a youth/amateur competition machine best suited to developing riders with prior dirt bike experience moving up from smaller minis, not adult novices or road riders.
PurposeBuilt purely for motocross racing and track practice, not for trail riding, commuting, or general recreation.
Rider FitIts tiny 161 lb wet weight and low seat height suit smaller, lighter riders, typically pre-teens to young teens, rather than full-grown adults.
CharacterA high-strung, rev-happy two-stroke that rewards aggressive clutch and throttle work with sharp, flickable handling on motocross tracks.
Not Ideal ForNot for adult riders, highway use, long-distance touring, or anyone seeking a comfortable or forgiving first bike.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2015 Yamaha YZ85 Rider Ergonomics Assessment

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

Feet:

At 841mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2015 Yamaha YZ85, with a cramped knee angle of around 70 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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