Namura Technologies NA-20040-6K Top End Rebuild Kit +1.50mm Oversize 83.46mm

The Namura Technologies NA-20040-6K is a complete top end rebuild kit designed for Kawasaki KAF400 Mule utility vehicles. This kit delivers everything needed for a thorough top end restoration, including a precision-machined oversize piston at 83.46mm (+1.50mm / +0.060"), piston rings, wrist pin, retaining clips, top end wrist pin bearing, and a full top end gasket kit — all engineered to OEM specifications.

Kit Includes:

• Oversize piston — 83.46mm (+1.50mm oversize)
• Piston rings
• Wrist pin
• Retaining clips
• Top end wrist pin bearing
• Complete top end gasket kit (OE-spec, no trimming required)

Advanced Piston Technology:

• MOS2 (Molybdenum/Teflon) Coated Skirts — Applied via a rolled-on process that bonds 10 times stronger than spray-on coatings, providing increased heat transfer, reduced friction, and protection against cold seizures
• Machined Smooth Head — Reflects combustion heat and reduces carbon buildup on the piston crown; testing has shown potential gains of up to 6% in horsepower and fuel economy
• Anodized Dome — Increases heat resistance and durability; anodized pistons are 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

The included gasket set is manufactured to OE specifications with no trimming or fitment modifications required. This kit is an efficient and cost-effective alternative to full cylinder replacement, restoring top end performance at a fraction of the cost.