Namura NX-20025-4K Top End Repair Kit, 67.40 mm

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 reliable top-end performance with the Namura NX-20025-4K Top End Repair Kit. Designed for service and rebuild applications, this kit provides a convenient solution for replacing key top-end components in a compatible engine. The 67.40 mm specification helps identify the intended piston size and supports accurate parts selection during maintenance or repair.
The Namura top end repair kit is supplied as a complete kit, helping simplify the replacement process and reduce the need to source components individually. Its application-focused design makes it suitable for professional technicians, powersports repair shops, and experienced home mechanics following the manufacturer’s service procedures. Always verify engine compatibility, piston specifications, and required clearances before installation.
Built for dependable repair support, the Namura NX-20025-4K kit is a practical choice for rebuilding a worn or damaged top end. Use the part number when matching this kit to your application, and inspect related engine components before assembly to help ensure proper fit, performance, and service life.

Features:

• Brand: Namura

• Part Number: NX-20025-4K

• Product Type: Top end repair kit

• Piston Size: 67.40 mm

• Unit of Measure: Kit

• Application: Engine top-end repair and rebuild service