2021 Yamaha YZ250X

Chassis / Suspension

• 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.

Engine

• 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.

Other Features

• 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.

Top Features

• 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.