REARWARD SLANTED ENGINE
Featuring Yamaha's revolutionary front-intake, rear-exhaust, liquid-cooled, DOHC four-stroke engine, there's also a six-speed, wide-ratio transmission, and a new heavy-duty large diameter clutch delivering enhanced durability.
BILATERAL BEAM FRAME
The new bilateral beam frame features forged sections at the swingarm pivot and engine mounting brackets to provide a nimble lightweight feeling in tight technical terrain while still providing control in fast sections.
All-new bodywork is more compact than ever, to ease the rider's movement across the machine in tough terrain. The fuel tank now provides 8.2 litres of fuel with a larger fuel cap opening, and the graphics are still embedded in the body moldings for long-lasting good looks.
SMARTPHONE POWER TUNER APP
Power is controlled by Yamaha's exclusive smartphone Power Tuner app that puts precision tunability in the rider's hands. A handlebar-mounted button switches between two preselected engine maps on the fly.
Yamaha's class leading KYB suspension ensures maximum control and traction. The fully adjustable spring-type forks with speed-sensitive damping, and rear shock with large 50mm piston have been thoroughly tested and tuned for cross country racing.
CROSS COUNTY FEATURES
With the electric starting system, a 8.2L fuel tank, rugged plastic skid plate, 18-inch rear wheel and XC racing tyres, the YZ250FX is ready to win right out of the box.
HIGH EFFICIENCY ANGLED RADIATORS
To ensure that the new more powerful engine runs efficiently in all conditions, Yamaha's engineers have developed radiators that are angled to directly face the incoming air. By maintaining a consistent airflow, this angled radiator layout delivers effective engine cooling for winning performance. A thermo fan cuts in to keep the fluid cool when the going gets tough.
TOUGHER WIDE RATIO 5-SPEED TRANSMISSION
The WR450F's robust 5-speed transmission is built to handle even the most aggressive left foot. The specially-developed gears feature a large surface area that spread the load, and third and fourth have received a surface treatment to increase durability. In addition, the shift drum and selectors now give improved feel and a shorter stroke when shifting gear. Ratios are ideal for enduro riding with lower gearing from first to third gear and taller-geared fifth compared to YZ450F.
MASS-CENTRALISED WRAPAROUND EXHAUST
A key feature of the WR450F is its mass centralised design, in which major components are located as close to the bike's centre of gravity as possible. One example of this is the wraparound exhaust that snakes around the cylinder - this design also enables the fitment of a muffler that is mounted close to the bike's centre. The WR450F runs a YZ450F exhaust with WRF specific muffler to achieve the goal of increased power with control. Combined with the rearward-slanted cylinder, the exhaust centralises mass and contributes significantly towards lightweight and dynamic handling performance.