Top End Kit 83.5/+0.50 11:1 Yam - Topline Performance Products

Features:

• Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit


• MOS2 (Teflon/Molybdenum) Coated Skirts - A rolled on application process provides a 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

Fits
Yamaha YFM400 Big Bear 2WD [SRA] 2000 to 2004
Yamaha YFM400FA Kodiak 4WD [SRA] 1993 to 1999
Yamaha YFM400FB Big Bear 4WD [SRA] 2000 to 2006
Yamaha YFM400FBI Big Bear 4WD [IRS] 2007 to 2010