Namura Technologies NX-40026KA Top End Repair Kit Standard Bore 67.94mm

The Namura Technologies NX-40026KA Top End Repair Kit is a complete, all-in-one solution for restoring your powersports engine to peak operating condition. This kit delivers everything needed for a full top-end rebuild, saving time and eliminating the need to source individual components separately.

Kit Includes:

• Piston
• Piston rings
• Wrist pin
• Wrist pin clips
• Top-end bearing
• Complete top-end gasket kit

MOS2 (Teflon/Molybdenum) Coated Piston Skirts

Namura applies the MOS2 coating using a rolled-on process that creates a bond up to 10 times stronger than conventional spray-on coatings. This advanced coating improves heat transfer, reduces friction between the piston and cylinder wall, and helps prevent cold seizures during startup.

Machined Smooth Piston Crown

The polished piston crown reflects combustion heat away from the piston surface and reduces carbon buildup. This design feature helps protect the top of the piston and, in testing, has shown potential horsepower and fuel economy improvements of up to 6%.

Anodized Piston Dome

Hard anodizing increases heat resistance and overall durability. Namura's anodized domes are engineered to be up to 75% stronger than non-anodized pistons, significantly extending service life under demanding operating conditions.

Hypereutectic Casting Process

Namura pistons are cast using a hypereutectic process that results in a higher silicon content compared to standard cast pistons. This translates to tighter thermal expansion tolerances, enhanced wear resistance, and the ability to withstand elevated cylinder temperatures without loss of performance.

The included gasket kit is manufactured to OE specifications, ensuring proper fitment with no trimming required. This top end repair kit provides a cost-effective alternative to cylinder replacement while delivering performance and durability that meets or exceeds original equipment standards.