Namura Technologies
Namura Technologies NA-40005-4K Top End Repair Kit - 1.00mm Oversize to 83.95mm
Generally ships to addresses in the contiguous United States the same business day if ordered by 12:15PM Central Time!
Bore: 83.95mm
Sizing: 1.00mm Oversize
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.
Yamaha YFM250 Bruin 2005-2006
Yamaha YFM350 Bruin Auto 2x4 2004-2006
Yamaha YFM350 Grizzly 4x4 Auto 2007-2014
Yamaha YFM350 Grizzly Auto 2014
Yamaha YFM350 Grizzly Auto 2007-2012
Yamaha YFM350 Grizzly IRS 4x4 Auto 2007-2012
Yamaha YFM350 Raptor 2004-2013
Yamaha YFM350 Wolverine 2006-2009
Yamaha YFM350F Wolverine 4x4 1995-2005
Yamaha YFM350FW Big Bear 4x4 1987-1999
Yamaha YFM350U Big Bear 2x4 1996-1999
Yamaha YFM350X Warrior 1987-2004
Bore: 83.95mm
Sizing: 1.00mm Oversize
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.
Yamaha YFM250 Bruin 2005-2006
Yamaha YFM350 Bruin Auto 2x4 2004-2006
Yamaha YFM350 Grizzly 4x4 Auto 2007-2014
Yamaha YFM350 Grizzly Auto 2014
Yamaha YFM350 Grizzly Auto 2007-2012
Yamaha YFM350 Grizzly IRS 4x4 Auto 2007-2012
Yamaha YFM350 Raptor 2004-2013
Yamaha YFM350 Wolverine 2006-2009
Yamaha YFM350F Wolverine 4x4 1995-2005
Yamaha YFM350FW Big Bear 4x4 1987-1999
Yamaha YFM350U Big Bear 2x4 1996-1999
Yamaha YFM350X Warrior 1987-2004
Please Note: Ships same business day to contiguous US if ordered by 12:15 PM Central Time!
Note: NA-40005-4K