Namura .040 Over Bore Piston Kit for Polaris fits 2003-2013 330 ATV's - 79.5mm

.040 Over Bore Piston Kit for Polaris

This Namura .040 over bore piston kit fits 2003-2013 Polaris 330 ATVs with a 79.5mm bore, delivering a reliable replacement for worn pistons to restore engine power and efficiency.

Overview

The .040 Over Bore Piston Kit for Polaris is a high-quality aftermarket replacement designed for 2003-2013 Polaris 330 ATV models. With a 79.5mm bore size (.040 over standard), this piston kit provides a fresh surface for cylinder honing and restores compression in engines that have been bored over. This kit is an ideal solution for rebuilding the top end of your Polaris 330 ATV.

Built For Performance

• 79.5mm piston size (.040 over standard) for precise fit after cylinder overbore
• Includes piston, rings, wrist pin, and circlips for complete installation
• High-silicon aluminum alloy construction for durability and heat resistance
• Precision-machined ring grooves ensure proper ring sealing
• Manufactured by Namura, a trusted aftermarket piston brand

Fits These Machines

• for Polaris 330 ATV (2003-2013)

On-The-Job Use

• Trail riding and utility ATV use
• Engine rebuild after high mileage or wear
• Restoring lost power and performance
• Compatible with Polaris 330 models including Trail Boss and Sportsman variants

Specs At A Glance

Good To Know

Q: Does this kit include a gasket set? A: No, this kit includes the piston, rings, wrist pin, and circlips only; gaskets are sold separately.

Q: Can I use this piston on a standard bore cylinder? A: No, this piston is designed for a cylinder that has been bored .040 over (79.5mm); it will not fit a standard 78mm bore.

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