Manufactured by Yamaha Cam chain OEM# 94580-41104-00 Fits the following models: 1983-1985 Yamaha Tri-Moto 200 (YTM200) 1985 Yamaha Tri-Moto 200 (YTM200ER) 1983-1985 Yamaha Tri-Moto 225 (YTM225DX) 1985-1986 Yamaha Tri-Moto 225 (YTM225DR) 1983-1984 Yamaha Yamahauler 200 (YTM200E) 1985 Yamaha Moto-4 200 (YFM200) 1986-1989 Yamaha Moto-4 200 (YFM200DX) 1986-1988 Yamaha Moto-4 225 (YFM225) 1989-1991 Yamaha Moto-4 250 (YFM250) 1989 Yamaha Pro-Hauler 230 (YFU1) 1992-1998 Yamaha Timberwolf 250 2x4 (YFB250) 1994-2000 Yamaha Timberwolf 250 4x4 (YFB250FW) 1999-2004 Yamaha Bear Tracker 250 2x4 (YFM250X) 2005-2006 Yamaha Bruin 250 2x4 (YFM250B) 2007-2009 Yamaha Big Bear 250 2x4 (YFM250B)