2026 YZ125

Updated intake system

The complete intake system has been updated. The air filter’s intake has been enlarged and reshaped to allow air through more smoothly, and the joints have been updated for a smoother connection to the carburettor. All carburettor settings have been optimised for balanced fuel flow at all throttle openings. And ignition timing has been updated for optimal combustion at every degree of throttle opening.

Most powerful YZ125 engine

The high-tech 125cc 2-stroke engine is the most powerful unit ever used on the YZ125. Equipped with Yamaha's famous YPVS (Yamaha Power Valve System) that gives instant response and excellent useability across the rpm range – and featuring lightweight race-bred internals – it's destined to take you to the victorYZone!

Ultra-slim bodywork

The latest generation bodywork is ultra-slim, with the area between the rider's knees the narrowest it's ever been on a YZ125 – and this athletic and modern design underlines the bike's lightness and compactness. These slim dimensions give a high level of rider mobility and reinforce this lightweight racer's feeling of agility.

Keihin Powerjet carburettor

The YZ125 is equipped with a Keihin PWK 38,1mm carburettor featuring a solenoid controlled powerjet for even more explosive performance – giving a real advantage out of the gate and when accelerating hard out of corners. A TPS (Throttle Position Sensor) and 3D map controlled CDI ensure optimised ignition timing, while the V-Force reed valve assembly ensures optimum intake efficiency at all engine speeds. The 2026 YZ125 allows riders to adjust carburettor settings with greater ease, making the machine even more adaptable and user friendly

Smooth shifting 6-speed transmission

Every second counts, and for reduced lap times the YZ125 runs with a super-smooth shifting 6-speed transmission that enables you to accelerate efficiently and keep ahead of the competition. Transmission ratios have been carefully chosen by Yamaha's engineers to maximize race performance and power output in all conditions.

Race developed ergonomics

Engine performance is just one element of being competitive – the ability to handle the power effectively and take total control of the chassis is also vital. A flat seat with a low front combined with a slim tank and narrow radiator shrouds make it easy to shift your weight around the bike for increased controllability when braking, accelerating and cornering.

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. With idealised low-speed damping settings on both the front and rear suspension systems, the YZ125 delivers class-leading handling and excellent traction.

Powerful braking system

The brakes on the YZ125 have been developed to handle the engine's high performance. The 270mm diameter front disc and 240mm diameter rear disc are equipped with big-piston calipers that produce effective and controllable stopping power.

Single bolt seat fixing

A single bolt seat fixing gives quick and easy maintenance, and the design of the aluminium rear frame also contributes towards intake efficiency by enabling a smooth flow of fresh air into the airbox.

In-mould graphics and factory style rims

Sporting the eye-catching updated ‘Icon Blue’ colours and graphics, the YZ125 looks the part with its dynamic look completed with in-mould graphics and slimline bodywork, with factory-style rims completing the race-bike look.