PRODUCT

MOTORCYCLES (OFF-ROAD) MOTORCYCLES (ROAD) ATV SIDE-BY-SIDE SNOWMOBILE

EXPERIENCE RACING PARTS & ACCESSORIES FIND A DEALER

2026 YZ125X

KEY FEATURES

ENGINE

The YZ125's liquid-cooled 125cc two-stroke engine provides thrilling mid- to high-rpm power, along with supreme usability.

A revised compression ratio, revised YPVS timing and model-specific CDI unit create broad, usable power suited to cross country.

Intake design allows for a straighter, more efficient draw of air into the intake tract.

High-precision Hitachi Astemo® Keihin PWK38S carburetor provides clean, crisp throttle response and superior rideability.

An advanced, close-ratio six-speed transmission has wide gear teeth and optimized gear ratios for maximum performance.

A compact exhaust expansion chamber improves clearance in tight terrain while providing excellent exhaust efficiency.

Large-capacity radiator with dark louvers deliver an aggressive look and maximum cooling efficiency.

CHASSIS/SUSPENSION

Best-in-class Speed Sensitive 48mm KYB® fork is tuned for cross country, offering precise damping and 11.8 inches of travel.

Race-proven aluminum semi-double cradle frame provides the perfect balance of rigidity and flex for exceptional handling.

Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.

Fully adjustable KYB® shock provides exceptional rear wheel control, class-leading capability and 12.4 inches of travel.

High performance braking system features 270mm front rotor, 240mm rear rotor, large front pistons and rigid calipers.

Tapered aluminum handlebar include adjustable mounts for more comfortable ergonomics.

Slick blue Excel® rims provide exceptional durability and a premium look.

High performance Dunlop® Geomax MX33 tires offer outstanding cornering traction, stability and feel.

ADDITIONAL FEATURES

A flat seat, narrow fuel tank and well-integrated body panels combine to create greater freedom of movement.

Enduro features include an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain and reserve fuel petcock.

Premium embedded Yamaha graphics highlight the YZ family pedigree and provide excellent durability.

TOP FEATURES

Two-Stroke Power: Tuned for Enduro Racing

The YZ125X is optimized for the unique demands of Hare Scrambles and GNCC® racing. The powerful Yamaha Power Valve System (YPVS™)-equipped 125cc two-stroke engine is mated to a six-speed transmission for the ultimate cross country powerplant.

Lightweight Aluminum Frame

Ultra-lightweight YZ125-spec aluminum semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure.

High Performance Braking System

High-spec front and rear brake setup offer exceptional power and feel, while reducing unsprung weight.

Industry-Leading Suspension

Yamaha's renowned Speed Sensitive System KYB® spring-type front fork is matched with a high performance KYB® long-travel rear shock, both fully adjustable and tuned for the specific demands of cross country racing.

Bold YZ Styling

Along with slim, aggressive bodywork, the bold graphics scheme further highlights the YZ family pedigree. Premium Yamaha graphics are now embedded to provide excellent durability and scratch resistance.

GNCC®-Specific Features

Cross country focused suspension setup, optimized YPVS™ settings, lightweight Excel® wheels paired with Dunlop® Geomax MX33 tires, sealed O-ring chain, standard side stand and fuel tank petcock with reserve position all combine to make the perfect GNCC® racer.

ENGINE

Powerful 125cc Two-Stroke Engine

The YZ125X's advanced, liquid-cooled 125cc two-stroke engine provides impressive acceleration, thrilling mid- to high-rpm power, along with supreme usability.

Tuned for GNCC® Competition

The YZ125X utilizes a revised compression ratio, revised YPVS™ timing and a model-specific digital CDI unit compared to its motocross sibling"”all focused on creating a broad, usable power delivery specifically suited to cross country and enduro-style competition.

Efficient Air Intake Design

Intake design allows for a straighter, more efficient draw of air into the intake tract.

Precise Fueling

Refined 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.

Close-Ratio Six-Speed Transmission

An advanced, close-ratio six-speed transmission has wide gear teeth and optimized gear ratios for maximum performance.

Narrow Exhaust Pipe

The compact exhaust expansion chamber provides both horizontal and vertical clearance on tight, technical courses while still providing excellent exhaust efficiency.

New High-Capacity Radiator

A new high-capacity radiator with dark louvers delivers aggressive looks and improved cooling efficiency for demanding cross country racing conditions.

CHASSIS/SUSPENSION

Lightweight Frame

Race-proven, highly developed aluminum semi-double cradle frame is engineered to provide the perfect balance of rigidity and flex for competition-ready handling character and composure. Removable aluminum rear subframe is constructed of square-section tubing for reduced weight.

Industry-Leading KYB® Fork

Tuned for the demands of cross country racing, the Speed Sensitive System 48mm inverted KYB® fork includes a leaf spring in the mid-speed valve for more precise damping and increased comfort, while offering up 11.8 inches of travel. Additionally, a scraper between the dust and oil seal improves reliability in cross country conditions. New for 2025, the fork now includes a hand-adjustable knob for quick, toolless compression adjustments.

Advanced KYB® Shock

Fully adjustable KYB® rear shock features reduced-friction Kashima Coat™ internals, separate adjusters for high- and low-speed compression damping, a full lock oil rebound system for increased comfort, and 12.4 inches of travel. It all adds up to fantastic rear wheel control and class-leading capability.

High Performance Brake System

A high performance, lightweight braking system features large front pistons, rigid calipers, and 270mm front rotor and 240mm rear rotor, all combining to provide exceptional braking power and feel along with reduced unsprung weight.

Premium Excel® Wheels & Dunlop® Tires

Slick blue Excel® rims provide exceptional durability and a premium look. They come wrapped in high performance Dunlop® Geomax MX33 tires for improved cornering traction, stability and feel.

ADDITIONAL FEATURES

Bold YZ Styling

Cross Country Ergonomics

A racy "gripper"-type seat and narrow fuel tank combined with a tapered aluminum handlebar and adjustable mounts create greater freedom of movement and more comfortable ergonomics for riders.

Cross Country Features

The YZ125X is focused on enduro competition with an 18-inch rear wheel, larger rear sprocket, side stand, sealed O-ring chain, reserve fuel petcock and a new water-resistant PVC handle bar pad, all adding up to exceptional cross country performance.

*Manufacturer's Suggested Retail Price (MSRP) shown. Does not include tax, title, prep or destination charges. Actual prices set by dealer.
**Fuel Economy is estimated.
***Wet weight includes the vehicle with all standard equipment and all fluids, including oil, coolant (as applicable) and a full tank of fuel. It does not include the weight of options or accessories. Wet weight is useful in making real-world comparisons with other models.