This rear wheel axle hub works on the following models 1999 – 2004 Yamaha BEAR TRACKER YFM250 1987 – 1989 Yamaha BIG BEAR 2002 – 2003 Yamaha BIG BEAR 400 2WD YFM400 2000 – 2006 Yamaha BIG BEAR 400 4×4 YFM400 1990 – 1999 Yamaha BIG BEAR 2WD YFM350 1993 – 2002 Yamaha KODIAK 4X4 YFM400 2000 – 2001 Yamaha KODIAK 2WD YFM400 1993 – 1994 Yamaha MOTO-4 YFM350 1989 Yamaha MOTO-4 YFM350 1989 – 1991 Yamaha MOTO-4 YFM250 1992 – 2000 Yamaha TIMBERWOLF 4WD YFB250 1995 – 2005 Yamaha WOLVERINE 4×4 YFM350 1992 Yamaha YFM350