Will not accept OEM rings and rings will not work on OEM piston
Fits
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2002
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2003
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2004
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2005
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2006
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2007
Yamaha, YFM660FG Grizzly 4WD [IRS], , 2008
Yamaha, YFM660R Raptor, , 2001
Yamaha, YFM660R Raptor, , 2002
Yamaha, YFM660R Raptor, , 2003
Yamaha, YFM660R Raptor, , 2004
Yamaha, YFM660R Raptor, , 2005
Yamaha, YXR660F Rhino 660, , 2004
Yamaha, YXR660F Rhino 660, , 2005
Yamaha, YXR660F Rhino 660, , 2006
Yamaha, YXR660F Rhino 660, , 2007