Rhino 660 Big Bore Kit 102m Cylinder Head Assembly 686 Top End Kit Mudbuster Cam. FITS ALL YAMAHA RHINO and GRIZZLY 660 MODELS AND YEARS. Wiseco JE or CP forged piston. Valve adjustment screws with nuts. Steel intake and exhaust valves. Inner and outer valve springs. This is a bolt-on kit that requires no machining […]