Namura .020 Over Bore Piston Rings for Polaris 1990-1993 350 2-Stroke ATV 80.5mm

.020 Over Bore Piston Rings for Polaris

These .020 over bore piston rings for Polaris are designed to provide a proper seal for cylinders bored 80.5mm. The .020 over bore piston rings for Polaris maintain compression and prevent blow-by in 2-stroke engines.

Overview

The .020 over bore piston rings for Polaris serve as the sealing interface between the piston and the cylinder wall. These .020 over bore piston rings for Polaris are essential for completing a top-end rebuild after a cylinder has been resized. They are intended for engine builders working on 350cc 2-stroke engines.

Built For Performance

• Heat-treated steel for durability
• Optimized tension for 2-stroke bore size
• Chrome-plated finish for wear resistance
• Precise end gaps for consistent operation

Fits These Machines

• for Polaris 350 2-Stroke 1990-1993

On-The-Job Use

• Engine rebuilds following cylinder boring
• Restoring power to a high-hour engine
• Repairing low-compression issues

Specs At A Glance

Q: Do these require filing before installation? A: Always check ring end gaps in the cylinder before final assembly. Q: Will these fit a standard bore? A: No, these are specifically sized for an .020 overbore application.

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