NICHE Cylinder Kit Part Number: MK1000934 Includes: Cylinder Piston Piston Rings Wristpin Circlips (2) Head Gasket Base Gasket O-Ring Cylinder Studs (4) Cylinder Stud Washers (4) Spark Plug This Part is known to be Compatible with the following vehicles: Yamaha Grizzly 660 4X4: 2002-2008 Yamaha Grizzly 660 Ducks Unlimited Edition 4X4: 2006 Yamaha Grizzly 660 Hunter Edition 4X4: 2002-2008 Yamaha Grizzly 660 Limited Edition 4X4: 2003-2004 Yamaha Grizzly 660 Outdoorsman Edition 4X4: 2006 Yamaha Grizzly 660 Special Edition 4X4: 2005-2006 Yamaha Grizzly 660 Wetlands Hunter Edition 4X4: 2003-2005 Yamaha Raptor 660R Limited Edition: 2002-2004 Yamaha Raptor 660R Special Edition: 2005 Yamaha Raptor 660R: 2001-2005 Yamaha Rhino 660 4X4: 2004-2007 Yamaha Rhino 660 Ducks Unlimited Edition 4X4: 2007 Yamaha Rhino 660 Exploring Edition 4X4: 2006-2007 Yamaha Rhino 660 Hunter Edition 4X4: 2004-2007 Yamaha Rhino 660 Special Edition 4X4: 2006-2007 Yamaha Rhino 660 Sport Edition 4X4: 2007 A bolt on 102mm 686cc Big Bore Kit which includes all the parts shown to make a successful installation. Our Kits require no modification when you receive it. It will just slide into your case without hassle. Our Kits include a TRUE 686cc Cylinder with larger water jackets for greater cooling capacity. Don t waste your time re-boring buy new. You don t want to end up with over heating problems down the road. Includes a brand new 102mm Cylinder NGK spark plug 10:1 piston kit & high performance gasket set for an easy installation. Best of all our kits are ready to install right out of the box. No core Required. Quality Reliability and Affordability!