Manufactured by Kit includes connecting rod, bottom bearing, crank pin 2 washers Compatible with Yamaha models below: 1987 Big Bear 350 4×4 1987 Moto-4 350 (YFM350ER) 1987 Warrior 350 1988 Big Bear 350 4×4 1988 Moto-4 350 (YFM350ER) 1988 Warrior 350 1989 Big Bear 350 4×4 1989 Moto-4 350 (YFM350ER) 1989 Warrior 350 1990 Big Bear 350 4×4 1990 Moto-4 350 (YFM350ER) 1990 Warrior 350 1991 Big Bear 350 4×4 1991 Moto-4 350 (YFM350ER) 1991 Warrior 350 1992 Big Bear 350 4×4 1992 Moto-4 350 (YFM350ER) 1992 Warrior 350 1993 Big Bear 350 4×4 1993 Moto-4 350 (YFM350ER) 1993 Warrior 350 1994 Big Bear 350 4×4 1994 Moto-4 350 (YFM350ER) 1994 Warrior 350 1995 Big Bear 350 4×4 1995 Moto-4 350 (YFM350ER) 1995 Warrior 350 1996 Big Bear 350 4×4 1996 Big Bear 350 2×4 1996 Warrior 350 1997 Big Bear 350 2×4 1997 Big Bear 350 4×4 ***Will NOT fit YFM350FWB model*** 1997 Warrior 350 1998 Big Bear 350 2×4 1998 Warrior 350 1999 Warrior 350 2000 Warrior 350 2001 Warrior 350 2002 Warrior 350 2003 Warrior 350 2004 Raptor 350 2004 Warrior 350 2005 Raptor 350 2006 Raptor 350 2007 Raptor 350 2008 Raptor 350 2009 Raptor 350 2010 Raptor 350 2011 Raptor 350 2012 Raptor 350 2013 Raptor 350