Brand New Race-Driven Rear Driven Sprocket. Fits the following models: 2002-2014 Honda CRF450 R / 2005-2014 Honda CRF450 X1988 -2001 Honda CR500 R You will receive the following: 1 - 50 Tooth Rear Sprocket, all Race-Driven Sprockets Rear Driven Sprockets are made from OEM quality hardened steel to give you years and years of trouble-free service.