Namura Top END Kit 84.42/STD 11:1 NA-40008K for Yamaha YFM400A Kodiak 2WD [SRA] / YFM400FA Kodiak 4WD [SRA] & More

• 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 YFM400A Kodiak 2WD [SRA]: 2000-2004
• Yamaha YFM400FA Kodiak 4WD [SRA]: 2000-2006
• Yamaha YFM400FG Grizzly 4WD [IRS]: 2007-2008