2015 Yamaha WR450F TRAIL READY THE ULTIMATE COMBINATION: YZ250F STYLE CHASSIS WITH 450FI POWER. 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. Motorcycles Competition/Off Road DX9274124480336170165538 DX1