Back in the day it was Yamaha who pioneered the first serious youth motocross bikes – and we’re proud of the fact that the YZ85 has launched the careers of so many top riders.

Some forty years on we’re still a major force in youth MX – and it’s this in-depth experience that gives the Yamaha the edge. Featuring advanced engine and chassis technology and sharp bodywork, the YZ85 and YZ85LW large wheel look super cool

The YZ85/LW has a reliable 2-stroke liquid-cooled 85cc engine which produces smooth and useable power – and with its easy handling chassis and modern image, this cool Motocross bike is the choice of future champions.

Engine type Single cylinder, liquid-cooled, 2-stroke, reed valve
Displacement 84.7cc
Bore x stroke 47.5 mm x 47.8 mm
Compression ratio 8.1 : 1
Maximum power
Maximum Torque
Lubrication system Premix
Clutch Type Wet, multiple-disc coil spring
Carburettor Keihin PWK28/1
Ignition system CDI
Starter system Kick
Transmission system Constant Mesh, 6-speed
Final transmission Chain
Frame Semi double cradle
Front suspension system Upside-down telescopic fork
Front travel 275 mm
Caster Angle 27º
Trail 106 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 282 / 287* mm
Front brake Single Disc, Ø 220 mm
Rear brake Single Disc, Ø 190 mm
Front tyre 70/100-17 40M / 70/100-19 42M
Rear tyre 90/100-14 49M / 90/100-16 52M
Overall length 1,899 / 1,903* mm
Overall width 758 mm
Overall height 1,156 mm
Seat height 873 / 904* mm
Wheel base 1,285 / 1,286* mm
Minimum ground clearance 360 / 393* mm
Wet weight (including full oil
and fuel tank)
71 / 73* kg
Fuel tank capacity 5.0 litres
Oil tank capacity 0.5 litres
Remark *YZ85LW only

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