Namura Technologies NA-20040K Top End Rebuild Kit Standard Bore 81.96mm

The Namura Technologies NA-20040K is a complete top end rebuild kit engineered for Kawasaki KAF400 Mule utility vehicles at the standard bore size of 81.96mm. Designed for the professional powersports market, this all-in-one kit provides everything needed to restore your engine's top end to peak operating condition without the cost of a full engine replacement.

Kit Includes:

• Piston (81.96mm standard bore)
• Piston rings
• Wrist pin and circlips
• Top end gasket set
• Needle bearing (where applicable)

Piston Features:

• Hypereutectic cast construction with super-high silicone content for enhanced strength and reduced thermal expansion
• MOS2 (Molybdenum Disulfide / Teflon) coated skirts to minimize friction, reduce wear, and help prevent cold seizures
• Hard anodized piston dome rated at HRB 105 hardness — 75% stronger than non-anodized pistons — reflects combustion heat and reduces carbon buildup
• Machined smooth piston crown to reflect combustion heat and minimize carbon accumulation
• Minimized expansion and contraction for tighter, more consistent tolerances

Gasket Kit Features:

• Manufactured to OE specifications — no trimming or fitment adjustments required
• Constructed using high-performance materials including imported Australian Klingersil
• Excellent resistance to high-pressure applications and outstanding stress relaxation properties

Namura's top end rebuild kits are a smart, cost-effective alternative to full cylinder replacement, delivering high-performance results at a fraction of the cost. The NA-20040K is sized at the standard bore (81.96mm) and is also available in multiple oversizes in 0.25mm increments to accommodate worn or re-bored cylinders.