To make it big in motocross you’ve got to put the hours in at the racetrack. So if you really are serious about getting to the top, you’re going to need skill, fitness and determination – and the right race bike, which is where the YZ125 comes in. With its explosive engine power and ultra-responsive aluminium chassis, this lightweight 125cc 2-stroke is a proven winner at the highest level.

This legendary dirt bike with its ultra-responsive front and rear suspension systems for agile handling and fast cornering – and its sharp bodywork gives a cool factory look. Now all that’s missing from the package is…you.

Engine type liquid-cooled, 2-stroke, Forward-inclined single cylinder, reed
valve with YPVS
Displacement 125cc
Bore x stroke 54.0 mm x 54.5 mm
Compression ratio 8.6 ~10.7 : 1
Maximum power
Maximum Torque
Lubrication system Premix
Clutch Type Wet, multiple-disc coil spring
Carburettor Mikuni TMX38
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 300 mm
Caster Angle 26º
Trail 109 mm
Rear suspension system Swingarm, (link suspension)
Rear Travel 315 mm
Front brake Single Disc, Ø 250 mm
Rear brake Single Disc, Ø 245 mm
Front tyre 80/100-21 51M
Rear tyre 100/90-19 57M
Overall length 2,137 mm
Overall width 825 mm
Overall height 1,295 mm
Seat height 975 mm
Wheel base 1,445 mm
Minimum ground clearance 363 mm
Wet weight (including full oil
and fuel tank)
94 kg
Fuel tank capacity 8.0 litres
Oil tank capacity 0.7 litres

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