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Yamaha YZ125

The YZ125 represents an important evolution in Yamaha’s two-stroke lineage. Yamaha engineers put considerable thought into developing a motorcycle that would be both dominant on the racetrack and user-friendly for developing riders looking to bridge the gap between recreation riding and competitive motocross.

The advanced liquid-cooled 125cc two-stroke engine provides impressive acceleration, thrilling mid- to high-rpm power, along with supreme usability. While the lightweight finely tuned chassis means nimble handling, more control and less rider fatigue - the ideal platform for advancing skills and gaining confidence.

Powerful Two-Stroke YZ125 Engine

Powerful Two-Stroke YZ125 Engine

Yamaha's advanced, liquid-cooled 125cc two-stroke engine provides impressive acceleration, thrilling mid- to high-rpm power, along with supreme usability.

Close-Ratio Transmission

Close-Ratio Transmission

Close-ratio six-speed transmission has wider transmission gear tooth width and optimised gear ratios for maximum performance.

Keihin Powerjet Carburettor

Keihin Powerjet Carburettor

High-precision Hitachi Astemo® Keihin PWK38S carburetor features a power jet, throttle position sensor and 3D-map- controlled CDI unit for precise ignition timing. The result is clean, crisp throttle response, superior rideability and excellent over-rev character.

Best-In-Class KYB Suspension

Best-In-Class KYB Suspension

Yamaha's SSS (Speed Sensitive System) KYB front forks are widely regarded as being amongst the best designs available on a production motocross bike, and the VZ125 features low speed damping settings on both the front and rear suspension systems for better handling characteristics.

Lightweight Frame

Lightweight Frame

Race-proven, highly developed aluminium semi-double cradle frame is engineered to provide just the right amount of strength and flex for the perfect balance of stability and cornering performance. Removable aluminium rear subframe is constructed of square-section tubing for reduced weight.

Powerful Braking System

Powerful Braking System

The high performance braking system features a 270mm front rotor, 240mm rear rotor, large front pistons and rigid calipers, all combining to provide exceptional braking power and feel.

Race-developed Ergonomics

Race-developed Ergonomics

Complete with an aluminium handlebar, two-position adjustable handlebar clamp, wide footpegs, gripper seat, adjustable clutch lever with works-style cable adjuster and lightweight rear sprocket design, the YZ125 is competition-ready straight out of the crate.

Technical Specifications

Yamaha YZ125 Specs


Engine Type: Liquid cooled, 2-stroke, reed-valve

Displacement (cc): 125.0

Bore x Stroke (mm): 54.0 x 54.5

Compression Ratio: 8.2 - 10.1 : 1

Lubrication System: Premix

Fuel Management: PWK38S

Ignition: CDI

Starter System: Kick

Fuel Tank Capacity (L): 7.0

Final Transmission: Chain

Transmission: Constant mesh 6-speed


Frame Type: Aluminium controlled filled semi double cradle

Suspension Front: Telescopic forks, 300mm travel

Suspension Rear: Swingarm (link suspension), 315mm travel

Brakes Front: Hydraulic single disc, 270mm

Brakes Rear: Hydraulic single disc, 240mm

Tyres Front: 80/100-21 Bridgestone Battlecross X20F

Tyres Rear: 100/90-19 Bridgestone® Battlecross X20


Length (mm): 2135

Width (mm): 825

Height (mm): 1295

Seat Height (mm): 975

Wheelbase (mm): 1440

Ground Clearance (mm): 365

Wet Weight (kg): 95


Colours and trims displayed here are a guide only and may vary from actual colours due to the display process.

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