2015 Yamaha WR450F, Proven 5-valve engine - THE ULTIMATE COMBINATION: YZ250F STYLE CHASSIS WITH 450FI POWER. The WR450F offers 3 main advantages over its competition; an easy to ride demeanor, unparalleled reliability, and the versatility to win in a number of different racing disciplines. Featuring a proven 5-valve engine design, the biggest WR also sports a Keihin fuel injection system, a lightweight aluminum Bilateral Beam frame and YZ based suspension. Packed with legendary Yamaha features: advanced, light aluminum YZ250F-bred frame for scalpel sharp steering; powerful, reliable high-revving five-titanium-valve engine with fuel injection delivering crisp linear throttle response; plus slim bodywork for ultra-lightweight handling combine with open-class power - for the best of both worlds.
