Namura Big Bore Piston Kit for Polaris fits many 2005-2016 800 ATV & UTV - 82mm

Big Bore Piston Kit for Polaris

This aftermarket big bore piston kit for Polaris, featuring an 82mm bore size, increases displacement and power for select 2005-2016 800cc ATVs and UTVs.

Overview

The Namura big bore piston kit is designed to enhance engine performance by increasing cylinder displacement in Polaris 800cc models. This big bore piston kit delivers improved torque and horsepower for demanding riding or working conditions. Ideal for enthusiasts seeking a reliable boost in power without replacing the entire engine.

Built For Performance

• High-strength aluminum alloy construction for durability and heat resistance
• Precision-machined 82mm bore for optimal cylinder fit
• Includes piston rings, wrist pin, and circlips for a complete installation
• Designed to match OEM specifications for reliable performance
• Increases displacement from stock to boost low-end and mid-range power

On-The-Job Use

• Trail riding and recreational ATV use
• Utility work and hauling on rugged terrain
• Competitive racing and off-road events
• Extended riding sessions requiring consistent power delivery

Specs At A Glance

Good To Know

Q: Will this kit work with my existing cylinder? A: The cylinder must be bored to 82mm to accommodate this oversized piston; a professional machine shop can perform this service.

Q: Do I need to replace the cylinder head gasket? A: It is recommended to use a new top end gasket set when installing this piston kit to ensure a proper seal.

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