Namura Technologies NX-40011-1K Top End Repair Kit 56.23mm Oversized Piston Gasket Set

The Namura Technologies NX-40011-1K is a complete top end rebuild kit designed for Yamaha engines, featuring a 0.25mm oversized bore (56.23mm). This comprehensive kit includes everything needed for a professional-quality top end rebuild: forged piston, piston rings, wrist pin, circlips, top end bearing, and complete gasket set.

Advanced Piston Technology:

• MOS2 Coated Skirts: Features a rolled-on Teflon/Molybdenum coating that bonds 10 times stronger than spray-on alternatives, providing superior heat transfer, reduced friction, and protection against cold seizures
• Machined Smooth Dome: Precision-machined head reflects combustion heat and minimizes carbon buildup, potentially increasing horsepower and fuel economy by up to 6%
• Anodized Dome Construction: Hard-anodized surface treatment increases heat resistance and structural integrity, making the piston 75% stronger than non-anodized designs
• Hypereutectic Casting: Advanced manufacturing process creates a high-silicon content alloy with reduced thermal expansion, superior wear resistance, and ability to withstand extreme cylinder temperatures

This oversized kit is ideal for engines requiring a bore refresh or repair after wear or scoring. The 56.23mm bore size accommodates cylinder machining while restoring optimal compression and performance. All components meet or exceed OEM specifications for reliable, long-lasting engine performance.