Namura .040 Over Bore Piston Kit for Polaris Xplorer 250 4x4 fits 2000-2002 73mm

Namura .040 Over Bore Piston Kit for Polaris

This .040 over bore piston kit replaces the original pistons in Polaris Xplorer 250 4x4 ATVs from 2000 to 2002, restoring compression and performance.

Overview

The Namura .040 over bore piston kit is a direct replacement for Polaris Xplorer 250 4x4 engines requiring a 73mm bore after a .040 overbore. It includes the piston, rings, and wrist pin for a complete rebuild. This kit is designed for owners of 2000-2002 Polaris Xplorer 250 4x4 models seeking reliable engine restoration.

Built For Performance

• Manufactured from high-silicon aluminum alloy for reduced expansion and longer life
• Precision-machined rings ensure consistent compression and oil control
• Heat-treated wrist pin withstands high load and RPM conditions
• .040 over bore size provides a fresh surface for worn cylinders
• Direct-fit design eliminates need for modification

Fits These Machines

• for Polaris Xplorer 250 4x4 2000
• for Polaris Xplorer 250 4x4 2001
• for Polaris Xplorer 250 4x4 2002

On-The-Job Use

• ATV trail riding and utility work requiring reliable engine power
• Engine rebuilds after top-end wear or piston failure
• Performance restoration for recreational off-road use

Specs At A Glance

Good To Know

Q: Will this piston kit work with a standard 73mm cylinder bore? A: No, this is a .040 over bore piston and requires the cylinder to be bored to 73mm – it will not fit a standard bore cylinder.

Q: Can I reuse the old rings with this piston? A: It is strongly recommended to use the included new rings to ensure proper sealing and avoid premature wear.

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