Namura .020 Over Bore Piston Kit for Polaris fits 2003-2013 330 ATV's - 79mm

.020 Over Bore Piston Kit for Polaris

This Namura .020 over bore piston kit is designed for Polaris 330 ATVs (2003-2013), providing a 79mm piston for oversize engine rebuilds.

Overview

This Namura .020 over bore piston kit is an aftermarket top-end solution for Polaris 330 ATV engines from 2003 to 2013. It features a 79mm piston, which corresponds to a .020 inch overbore, allowing you to restore compression and performance on worn cylinders. The kit includes the piston, rings, wrist pin, and clips for a complete replacement.

Built For Performance

• 79mm piston provides .020 over stock bore for rejuvenating tired engines
• High-strength aluminum alloy construction for durability and heat dissipation
• Precision-machined ring grooves for optimal ring sealing
• Includes wrist pin and circlips for a complete installation
• Designed to match OEM specifications for reliable fitment

Fits These Machines

• for Polaris 330 ATV (2003-2013)
• for Polaris Sportsman 330
• for Polaris Trail Blazer 330
• for Polaris Magnum 330

On-The-Job Use

• Utility and recreational ATV riding on trails and farms
• Rebuilding engines after high mileage or wear
• Restoring power and reliability to older Polaris 330 ATVs
• Off-road adventures and light-duty work applications

Specs At A Glance

Good To Know

Q: Does this piston require boring the cylinder? A: Yes, this is an oversize piston, so the cylinder must be bored to 79mm to accommodate it; always have the cylinder measured and bored by a professional.

Q: Is the Namura piston a direct replacement for the OEM Polaris piston? A: This aftermarket piston is designed to match OEM dimensions and performance, but it is not an original Polaris part; confirm fitment with your engine's serial number.

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