Yamaha YZ 85 - 2007 Specifications and Reviews

The 2007 Yamaha YZ 85 is a lightweight motocross machine designed for young riders and beginners transitioning to competitive racing. Powered by a liquid-cooled 85cc single-cylinder two-stroke engine, it delivers impressive power delivery with manageable control. Known for its agile handling and accessible seat height, the YZ 85 remains an ideal platform for developing fundamental riding skills.

3.5 stars Average rating: 3.5 from 2 votes
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General information

CategoryCross / motocross
Year2007
ModelYamaha YZ 85
 
 

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
IgnitionCDI
Fuel systemCarburettor. PWK28 x 1
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 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.
Dry weight66.2 kg (146.0 pounds)

Yamaha YZ 85 dimensions and frame

Rear brakes diameter146 mm (5.7 inches)
Rear brakesSingle disc
Front brakes diameter198 mm (7.8 inches)
Front brakesSingle disc
Rear tyre dimensions90/90-M14
Front tyre dimensions70/80-M17
Rear suspensionSwingarm (link, suspension), coil spring/gas-oil damper, 11.3´
Front suspensionTelescopic Fork, coil spring/oil damper, 10.8´

Speed and acceleration

Fuel capacity4.92 litres (1.30 gallons)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering80%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a small-wheeled competition motocrosser built specifically for younger or smaller, developing riders, not adults or beginners to motorcycling in general.
PurposeDesigned purely for amateur motocross racing and off-road training on tracks scaled to junior riders.
Rider FitIts tiny 66 kg dry weight and low-for-motocross seat height suit lighter, smaller riders such as pre-teens and young teenagers rather than full-sized adults.
CharacterA high-strung, free-revving two-stroke that rewards aggressive clutch and throttle work with sharp, flickable handling on rough terrain.
Not Ideal ForThis is not suitable for adult commuting, highway travel, two-up riding, or anyone seeking comfort, storage, or long-distance capability.

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

Rider Fit Visualizer

2007 Yamaha YZ 85 Rider Ergonomics Assessment

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Feet:

At 864mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2007 Yamaha YZ 85, 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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