Namura .020 Over Bore Piston & Gasket Kit for KYMCO 2005-2010 300 ATV's 73.2mm

.020 Over Bore Piston & Gasket Kit for Namura for KYMCO 2005-2010 300 ATV's

This .020 over bore piston and gasket kit is a direct replacement for KYMCO 300 ATV engines from 2005 to 2010, providing a precise fit for a 73.2mm bore. It includes the piston, rings, and all necessary gaskets for a complete upper engine overhaul. OEM cross-reference numbers are not listed, but this kit is specifically designed for the 300cc KYMCO platform.

Overview

The Namura .020 over bore piston and gasket kit is designed for rebuilding KYMCO 300 ATV engines, restoring compression and performance. This kit contains a 73.2mm piston with rings and a full set of gaskets for a complete top-end refresh. It is an ideal solution for worn cylinders that require an oversized piston to achieve proper clearance.

Built For Performance

• .020 over bore size (0.5mm) for worn cylinder restoration
• Includes piston, rings, wrist pin, and complete gasket set
• High-strength aluminum alloy piston for durability
• Precision-machined for exact fit in KYMCO 300 engines
• Cost-effective alternative to OEM replacement parts

Fits These Machines

• for KYMCO 300 ATV (2005-2010)

On-The-Job Use

• Engine rebuilding after bore wear or damage
• Restoring power and compression in high-mileage ATVs
• Trail riding and utility work requiring reliable engine performance
• DIY mechanic and professional shop repairs

Specs At A Glance

Good To Know

Q: Does this kit come with a new wrist pin bearing? A: The kit includes the wrist pin, but does not include a separate bearing; the pin fits directly into the piston and connecting rod.

Q: Is cylinder honing required before installation? A: Yes, the cylinder should be honed to the proper crosshatch pattern for the new .020 over piston to ensure ring seating and oil control.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.