Namura .040 Over Bore Piston Rings for Polaris Sportsman 550 2009-2014 - 97.6mm

Namura .040 Over Bore Piston Rings for Polaris

These Namura piston rings are .040 over bore size (97.6mm) for Polaris Sportsman 550 models from 2009 to 2014, providing a precise fit for rebuilt engines.

Overview

The Namura .040 Over Bore Piston Rings for Polaris are designed for Sportsman 550 engines requiring oversized rings during a rebuild. These rings measure 97.6mm and provide a reliable seal for restored cylinders. They are a cost-effective replacement for OEM parts when boring cylinders.

Built For Performance

• Made from high-strength cast iron for durability
• Precision-ground to .040 overbore specification
• Reduced friction for better engine efficiency
• Compatible with stock and aftermarket pistons

Fits These Machines

• for Polaris Sportsman 550 (2009-2014)

On-The-Job Use

• Rebuilding engines after cylinder boring
• Restoring compression on worn-out ATVs
• Performing top-end overhauls for increased performance

Specs At A Glance

Good To Know

Q: Are these ring sets complete for one piston? A: Yes, each set includes all rings needed for one piston (compression and oil rings).

Q: Do I need a cylinder hone before installation? A: Recommended to hone the cylinder to ensure proper ring seating.

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