Piston Kit 83.5/+0.50 8.6:1 Yam

Will not accept OEM rings and rings will not work on OEM piston

Fitment:
Yamaha YFM400 Big Bear 2WD [SRA] 2000
Yamaha YFM400 Big Bear 2WD [SRA] 2001
Yamaha YFM400 Big Bear 2WD [SRA] 2002
Yamaha YFM400 Big Bear 2WD [SRA] 2003
Yamaha YFM400 Big Bear 2WD [SRA] 2004
Yamaha YFM400FA Kodiak 4WD [SRA] 1993
Yamaha YFM400FA Kodiak 4WD [SRA] 1994
Yamaha YFM400FA Kodiak 4WD [SRA] 1995
Yamaha YFM400FA Kodiak 4WD [SRA] 1996
Yamaha YFM400FA Kodiak 4WD [SRA] 1997
Yamaha YFM400FA Kodiak 4WD [SRA] 1998
Yamaha YFM400FB Big Bear 4WD [SRA] 2000
Yamaha YFM400FB Big Bear 4WD [SRA] 2001
Yamaha YFM400FB Big Bear 4WD [SRA] 2002
Yamaha YFM400FB Big Bear 4WD [SRA] 2003
Yamaha YFM400FB Big Bear 4WD [SRA] 2004
Yamaha YFM400FB Big Bear 4WD [SRA] 2005
Yamaha YFM400FB Big Bear 4WD [SRA] 2006
Yamaha YFM400FBI Big Bear 4WD [IRS] 2007
Yamaha YFM400FBI Big Bear 4WD [IRS] 2008
Yamaha YFM400FBI Big Bear 4WD [IRS] 2009
Yamaha YFM400FBI Big Bear 4WD [IRS] 2010
Yamaha YFM400FBI Big Bear 4WD [IRS] 2011
Yamaha YFM400FBI Big Bear 4WD [IRS] 2012