NA-10025-2K 68.90mm Top End Kit - High Performance Motorcycle Engine Upgrade Kit for Harley Davidson & Cruiser Bikes - Perfect for Engine Rebuilds & Performance Enhancements

Bore: 68.95mm Sizing: 0.50mm OversizeTop End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit. MOS2 (made with Teflon/Molybdenum) Coated Skirts A rolled on application process provides a fits Bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures. Machined Smooth Heads Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%. Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons. Hypereutectic Casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures.1997-2001 fits HON TRX250TM FourTrax Recon