With a "wide-track" chassis and long travel suspension, the 450R provides incredible stability, confidence and control. The powerful five-valve 449 cubic centimeter race engine is fuel injected with many components developed from our motocross bikes including the cylinder, cylinder head, cams and crank designs. The engine is cradled by a hybrid aluminum chassis for optimized strength and rigidity, making the YFZ450R the most capable racer we've ever developed.