Namura NX-30025-BK4 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 NX-30025-BK4 Top End Repair Kit provides a practical replacement solution for servicing the upper engine assembly. Designed for powersports maintenance and repair applications, this kit helps simplify the process of refreshing worn or serviceable top-end components while supporting dependable engine performance. The Namura brand is recognized for producing replacement engine parts intended to meet the needs of professional technicians, repair shops, and experienced powersports enthusiasts.

Use the NX-30025-BK4 as part of a planned top-end rebuild or repair where the original components require replacement due to wear, maintenance intervals, or engine service requirements. A properly selected repair kit can help streamline parts sourcing and keep related service work organized. Before installation, compare the part number with the application requirements and inspect all related engine components to confirm that additional parts or repairs are not needed.

This Namura top end repair kit is supplied as an individual unit and is identified by part number NX-30025-BK4. Its focused design makes it suitable for replacement-oriented engine service rather than general-purpose maintenance. Follow the engine manufacturer’s service procedures for disassembly, inspection, preparation, torque specifications, clearances, and break-in requirements. Professional installation is recommended when specialized tools or engine-building experience are required.

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