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.
2005-2006 Yamaha YFM250 Bruin
2004-2006 Yamaha YFM350 Bruin Auto 2x4
2007-2014 Yamaha YFM350 Grizzly 4x4 Auto
2007-2012 Yamaha YFM350 Grizzly Auto
2014 Yamaha YFM350 Grizzly Auto
2007-2012 Yamaha YFM350 Grizzly IRS 4x4 Auto
2004-2013 Yamaha YFM350 Raptor
2006-2009 Yamaha YFM350 Wolverine
1995-2005 Yamaha YFM350F Wolverine 4x4
1987-1999 Yamaha YFM350FW Big Bear 4x4
1996-1999 Yamaha YFM350U Big Bear 2x4
1987-2004 Yamaha YFM350X Warrior
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.
2005-2006 Yamaha YFM250 Bruin
2004-2006 Yamaha YFM350 Bruin Auto 2x4
2007-2014 Yamaha YFM350 Grizzly 4x4 Auto
2007-2012 Yamaha YFM350 Grizzly Auto
2014 Yamaha YFM350 Grizzly Auto
2007-2012 Yamaha YFM350 Grizzly IRS 4x4 Auto
2004-2013 Yamaha YFM350 Raptor
2006-2009 Yamaha YFM350 Wolverine
1995-2005 Yamaha YFM350F Wolverine 4x4
1987-1999 Yamaha YFM350FW Big Bear 4x4
1996-1999 Yamaha YFM350U Big Bear 2x4
1987-2004 Yamaha YFM350X Warrior
Please Note: Ships same business day to contiguous US if ordered by 12:15 PM Central Time!
Note: NA-40005-4K