Namura .020 Over Bore Piston Rings for Polaris 1990-1993 350 2-Stroke ATV's 81mm

.020 Over Bore Piston Rings for Polaris

These .020 Over Bore Piston Rings for Polaris facilitate correct cylinder pressure in a rebuilt engine by providing a tight seal between the piston and wall. The .020 Over Bore Piston Rings for Polaris are sized at 81mm to work with specific over-bored cylinders.

Overview

The .020 Over Bore Piston Rings for Polaris are critical for restoring power in 2-stroke engines that have undergone cylinder boring. Using these .020 Over Bore Piston Rings for Polaris ensures that oil consumption remains controlled and compression is maximized. Technicians trust these .020 Over Bore Piston Rings for Polaris for long-term engine reliability.

Built For Performance

• High-grade alloy for heat resistance
• Precision tension for optimal wall contact
• Designed for 2-stroke engine lubrication patterns
• Correct sizing for .020 over-bored cylinders

Fits These Machines

• for Polaris 350 2-Stroke 1990
• for Polaris 350 2-Stroke 1991
• for Polaris 350 2-Stroke 1992
• for Polaris 350 2-Stroke 1993

On-The-Job Use

• Engine top-end overhauls
• Repairing scored cylinder walls via over-boring
• Restoring compression on aging 2-stroke engines

Specs At A Glance

Good To Know

Q: Do I need to gap these rings? A: Yes, always verify end-gap measurements in your cylinder before final assembly.

Q: Will these work in a stock cylinder? A: No, these are oversized and intended for cylinders that have been machined to .020 over standard.

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