The culmination of more than 50 years of Yamaha two-stroke innovation, the latest YZ125 is a bike built to take you to the VictorYZone.
Featuring lightweight race-bred engine internals and the renowned torque-boosting Yamaha Power Valve System (YPVS), the YZ125 develops hard-hitting power that keeps you out front.
Along with its advanced aluminium frame, class-leading KYB® suspension and ultra slim bodywork providing a high degree of controllability both on the ground and in the air, it’s designed for competition straight out of the box.
Features
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 six-speed transmission has wider transmission gear tooth width and optimised gear ratios for maximum performance.
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
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 YZ125 features low speed damping settings on both the front and rear suspension systems for better handling characteristics. Tool-free compression adjustment now features on top of each fork leg.
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
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
Complete with an aluminium handlebar, two-position adjustable handlebar clamp, lightweight bar pad, 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 Specification
Colours
Engine
Chassis
Dimensions
| 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 |
| 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 51M Tube type |
| Tyres Rear | 100/90-19 57M Tube type |
| Length (mm) | 2135 |
| Width (mm) | 825 |
| Height (mm) | 1295 |
| Seat Height (mm) | 980 |
| Wheelbase (mm) | 1445 |
| Ground Clearance (mm) | 365 |
| Wet Weight (kg) | 96 |
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