Engineered with all the reliability and durability you've come to expect from Yamaha, this 2‑stroke was born to win Cross Country races.
GNCC-Tuned YZ250 Power
Based on the legendary YZ250 249cc liquid-cooled reed-valveinducted 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, improving both horizontal and vertical clearance on tight, technical trails, while still providing excellent exhaust efficiency.
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.
Smooth-shifting, five-speed, wide-ratio transmission ensures proper gearing from tight woods sections to wide-open fire roads.
YZ250 Cooling System
Large-capacity radiator features a ten-row core with four louvers for maximum cooling efficiency.
Digital CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband, specifically tuned for the needs of the YZ250X.
A carefully engineered aluminum frame and swingarm give the YZ250X the famous handling proven by the championship winning YZ250 motocross machine on tracks around the world.
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 offers 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—all 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 AT81 tires front and rear are ready to head straight to the races. An 18-inch rear tire has a taller sidewall to improve comfort and reduce pinch flats.
A racy "gripper" type seat and narrow fuel tank combine with a tapered aluminum handlebar and adjustable mounts to create greater freedom of movement and more comfortable ergonomics for riders.
Off-road focused tires with an 18” rear wheel, wide-ratio gearing, a standard side stand, sealed O-ring chain and a reserve fuel petcock.