4 CHAMPIONS. 7 SHOOTOUTS. ZERO COMPETITIONReigning 2-straight MX and SX West Champion and winner of every major 250 shootout! More refined for 2017. The best just got even better.Features may include:Innovative Engine DesignA liquid-cooled, DOHC 4-valve, fuel-injected engine with forward-positioned downdraft intake delivers class leading engine power, updated for 2017 to further improve top-end power. This engine design allows for unmatched mass centralization, concentrating the motorcycle's key components—engine, fuel tank and exhaust system—toward the center of the motorcycle achieving light and nimble handling performance.Updated TransmissionNew gear dogs, revised gear tooth designs and a host of smaller changes create a smoother overall transmission with improved shifting, as well as a stronger overall powertrain for improved durability.Bilateral Beam Aluminum FrameA Yamaha's renowned bilateral beam aluminum frame features compact overall dimensions that balance minimal weight with the strength and rigidity needed for race-winning performance. This frame features a new forged section at the swingarm pivot, and engine mounting brackets for tuned responsiveness, handling and unmatched lightweight feeling.Updated Suspension SettingsIndustry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping features revised valving for improved suspension feel and balance. The KYB® rear shock also features settings optimized for ideal damping characteristics.GYTR® Power Tuner ReadyAccessory GYTR Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons, as well as monitor engine diagnostic codes.
The Motocross & Supercross ChampionA winner right out of the gate - multi-time magazine shootout winner, National MX Champion and West Region SX Champion. The YZ250F is even better for 2016.Features May Include:Innovative Engine, Updated for More Top-End PowerLiquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned, straight intake, rear-inclined cylinder and rear positioned exhaust layout as the YZ450F – now with further optimized crank balance and even more advanced piston technology between the cases.Advanced Fuel InjectionThe four-titanium-valve cylinder head is matched to a battery-less fuel injection system that provides optimized power at any rpm. The fuel injection system instantly adjusts the air/fuel mixtures depending on altitude and temperature, for a hesitation-free engine that delivers no matter the conditions.