Namura Technologies NX-40025-BK Top End Repair Kit with MOS2 Piston & Gasket Set

The Namura Technologies NX-40025-BK Top End Repair Kit delivers everything needed for a complete top-end engine rebuild in a single, convenient package. Engineered for powersports applications, this kit pairs a high-performance hypereutectic piston with a full gasket set to restore your engine to peak operating condition.

Kit Includes:

• Piston
• Rings
• Wrist pin
• Wrist pin clips
• Top-end bearing
• Full gasket kit

Piston Technology & Features:

• MOS2 (Teflon/Molybdenum) Coated Skirts — Applied via a rolled-on process that bonds 10x stronger than spray-on coatings, delivering improved heat transfer, reduced friction, and protection against cold seizures.
• Machined Smooth Heads — Reflects combustion heat away from the piston crown and reduces carbon buildup. Testing has shown potential gains of up to 6% in horsepower and fuel economy.
• Anodized Dome — Increases heat resistance and overall durability; anodized pistons test up to 75% stronger than non-anodized alternatives.
• Hypereutectic Casting Process — Higher silicon content reduces thermal expansion rates, improves wear resistance, and allows the piston to withstand elevated cylinder temperatures.

Namura's top-end gasket sets are manufactured to OE specifications, ensuring proper fitment with no trimming required. This kit offers a cost-effective alternative to full cylinder replacement while restoring reliable, high-performance engine operation.