2021 Yamaha YZ 250X

Stunning Two-Stroke Power: Tuned for Cross Country and Hare Scrambles Racing
The YZ250X is optimized for the unique demands of Hare Scrambles and GNCC® racing. The YPVS™-equipped 249cc two-stroke engine is combined with a wide-ratio five-speed transmission for the ultimate cross country power plant.

Motocross-Derived Aluminum Frame
Ultra-lightweight YZ250-spec frame features carefully engineered combination of aluminum castings, forgings and extrusions for the perfect balance of rigidity and flex. The industry-leading fully adjustable, the KYB® speed sensitive spring-type suspension is tested and tuned specifically for the needs of cross country racers.

Racing Style and Ergonomics
The YZ250X carries the racing heritage of the YZ250 motocrosser with its aggressive styling from the front fender to the rear brake protector. Complete with an aluminum tapered handlebar, YZ-F-style foot pegs, gripper seat, and off-road specific Dunlop® tires, the YZ250X is ready to race out of the crate.

GNCC-Specific Features
18-inch rear wheel, sealed O-ring chain, wide ratio transmission, narrow expansion chamber, off-road focused tires and suspension settings, a standard side stand and fuel tank petcock with reserve position are perfect for GNCC riding.

270mm Front Brake
Large 270mm front disc brake coupled with high-performance pad material offer outstanding machine control and performance, with exceptional stopping power and controllability.

GNCC-Tuned YZ250 Power
Based on the legendary YZ250 249cc liquid-cooled reed-valve-inducted two-stroke engine, the YZ250X utilizes a revised compression ratio, exhaust port timing, revised Yamaha Power Valve System (YPVS) timing and a model-specific CDI unit—all focused on creating a wide, controllable power character ideal for cross country racing.

Revised Power Valve
The YZ250X features the patented Yamaha Power Valve System—with broader opening timing compared to the YZ250 for smoother power—to combine bottom-end acceleration with strong midrange and eye-opening top-end.

Narrow Exhaust Pipe
Unique compact exhaust expansion chamber is designed especially for the YZ250X to improve both horizontal and vertical clearance on tight, technical trails while still providing excellent exhaust efficiency.

Advanced Carburetor
The 38mm Keihin® PWK carburetor with throttle position sensor provides precise fuel/air mixing and crisp throttle response throughout the powerband.

Racing Intake System
Specially designed carbon fiber reed-valve petals improve throttle response and engine performance across the entire rpm range.

Wide-Ratio Gearing
Smooth-shifting, five-speed, wide-ratio transmission ensures proper gearing from tight woods to wide-open fire roads.

YZ250 Cooling System
Large-capacity radiator features a ten-row core with four louvers for maximum cooling efficiency.

Digital Ignition
Digital CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband, specifically tuned for the needs of the YZ250X.

YZ250-Based Frame
A carefully engineered aluminum frame and swingarm give the YZ250X the famous handling that's been proven by the championship-winning YZ250 motocross machine on tracks around the world.

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

270mm Front Brake
Large 270mm front disc brake coupled with high-performance pad material offer outstanding machine control and performance, with exceptional stopping power and controllability.

Industry-Leading KYB® Fork
Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping uses piston speed to control damping force for super-precise handling and a smooth ride. With minimal wasted stroke or abrupt shocks for the rider, this bike is tuned for the demands of cross country racing.

Smooth KYB® Shock
Rear, fully adjustable KYB® shock features 12.4 inches of travel, separate adjusters for high- and low-speed compression damping and a full lock oil rebound system for increased comfort, control and fantastic rear wheel traction.

Enduro-Specific Wheels and Tires
Cross Country-spec Dunlop® Geomax AT81front and rear tires are ready to head straight to the races. An 18-inch rear tire has a taller sidewall to improve comfort and reduce pinch flats.

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 YZ250X is off-road focused with an 18” rear wheel tire, wide-ratio gearing, a standard side stand, sealed O-ring chain and a reserve fuel petcock.