Yamaha YZ85 - 2013 Specifications and Reviews

The 2013 Yamaha YZ85 is a lightweight 85cc two-stroke motocross bike designed for young intermediate riders transitioning to larger machines. Known for its responsive reed-valve engine and nimble handling characteristics, it delivers the power and control needed for competitive junior racing and serious recreational riding.

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General information

CategoryCross / motocross
Year2013
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 detailsReed-valve-inducted
Engine typeSingle cylinder, two-stroke
Capacity:85.00 ccm (5.19 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc. Hydraulic disc.
Front brakes diameter220 mm (8.7 inches)
Front brakesSingle disc. Hydraulic disc.
Rear tyre dimensions90/100-14
Front tyre dimensions70/100-17
Rear suspension travel282 mm (11.1 inches)
Rear suspensionSingle shock
Front suspension 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 clearance351 mm (13.8 inches)
Overall width757 mm (29.8 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, etc71.2 kg (157.0 pounds)
 
 

Other specs

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

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

2013 Yamaha YZ85 Rider Ergonomics Assessment

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

Feet:

At 864mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2013 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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