Namura NX-40000K1 Standard Top End Repair Kit

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

Restore dependable top-end performance with the Namura NX-40000K1 Standard Top End Repair Kit. Designed for service and repair applications requiring a standard-specification replacement kit, this kit provides a convenient solution for refreshing critical upper-engine components while helping simplify the parts selection process. The Namura brand is recognized for producing replacement engine components for powersports and other demanding applications, making this kit a practical choice for maintenance, rebuild, or repair work.
The NX-40000K1 is supplied as a complete kit configuration, helping reduce the need to source compatible top-end service parts individually. Its standard specification is intended for applications that call for a standard replacement rather than an oversized or specialty configuration. Before ordering or installation, verify