NAMURA NA-50003-6K 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

The NAMURA NA-50003-6K Top End Repair Kit provides a convenient replacement solution for servicing the upper portion of a compatible engine. This kit is designed for repair and maintenance work where renewing top-end components is necessary to help restore dependable operation. Its kit format helps streamline the parts selection process and supports an organized repair from teardown through reassembly.
The NAMURA top-end repair kit is suited to professional technicians, powersports service departments, and experienced owners who require replacement components from an established engine parts brand. By supplying the intended repair components together, the kit can help reduce the need to source individual pieces separately and may help maintain a consistent service plan. Always compare the part number and manufacturer application information with the engine before ordering or beginning installation.
Part number NA-50003-6K identifies this NAMURA repair kit and should be used when verifying compatibility with the specific vehicle or engine. Follow the engine manufacturer’s service procedures for disassembly, inspection, preparation, torque specifications, break-in, and final testing. Proper installation is essential for reliable performance, and any additional components found worn or damaged during inspection should be addressed before the repair is completed. The kit is supplied as a repair kit with a unit of measure of kit; refer to the applicable