One boxed component kit provides the foremost compatible top-end rebuild solution. The Moly2000 centrifugally spun-cast cylinder sleeved iron bore provides better ring seal for better compression, more torque and more horsepower. 2-stroke kits are packaged complete with wear resistant Moly2000centrifugally spun-cast cylinder sleeve, matching pro-forged or pro-casted piston kit, wrist pin bearing and complete top-end gasket set. 4-stroke kit includes everything in the 2-stroke kit plus complete top-end gasket set and replacement valve stem seals.

Vehicle Fitment:
2002-2008 fits YAM YFM660F Grizzly 4x4
2004-2007 fits YAM YXR66F Rhino 660
2007 fits YAM YXR66F Rhino 660 Ducks Unlimited
2006-2007 fits YAM YXR66F Rhino 660 Exploring Edition
2006-2007 fits YAM YXR66F Rhino 660 Special Edition
2007 fits YAM YXR66F Rhino 660 Sport Edition