Pro-Bike Yamaha

YZ125 - Even harder to beat
The YZ125 is famous for its light handling which makes it easier to control and easier to ride. Combined with an ultra-responsive two-stroke engine, the end product is a highly competitive lightweight that’s hard to beat.

Major improvements for 2008 include new fork outer tubes, redesigned fork protectors and a new front axle which reduce weight for lighter steering. Delivering even better braking feel – together with reduced unsprung weight – is a new lightweight front brake caliper and wave-type front and rear discs. And for quicker acceleration the YZ125’s potent two-stroke engine is equipped with a new reed-valve spacer.

Engine -
Engine type: Liquid cooled, 2-stroke, reed valve, forward-inclined single cylinder, with YPVS
Displacement: 124 cc
Bore x stroke: 54.0 x 54.5 mm
Compression ratio: 8.6 - 10.7:1
Lubrication system: Premix
Carburettor: Mikuni TMX38
Clutch type: Wet, multiple-disc coil spring
Ignition system: CDI
Starter system: Kick
Transmission system: Constant mesh, 6 speed
Final transmission: Chain
Fuel tank capacity: 8.0 L
Oil tank capacity: 0.7 L

Chassis -
Chassis: Alu semi-double cradle
Front suspension system: Telescopic forks
Front travel: 300 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

Dimensions -
Length (mm): 2,139 mm
Width (mm): 827 mm
Height (mm): 1,318 mm
Seat height (mm): 998 mm
Wheel base (mm): 1,443 mm
Minimum ground clearance (mm): 388 mm
Dry weight (kg) 86 kg