The RPM Yamaha YFZ450 (04-08) Sprocket Hub is a heat treated, nickle plated hub for strength and longevity. Often times the splines on stock OEM components are not able to take the abuse of todays machines. RPM's Sprocket hubs have been proven to last, and are used by top racers across the globe. This sprocket hub includes RPM Part # EA0197 Seal Surface (pressed on) and a B0221 Snap Ring.
