Piston Rings .020 Over Bore for Yamaha 1983-2006 PW80 & 1986-1990 BW80 47.5mm

Piston Rings for Yamaha

These .020 over bore piston rings provide a reliable seal for the combustion chamber in 47.5mm cylinder bores for Yamaha PW80 and BW80 models.

Overview

These piston rings for Yamaha engines restore compression and power to your 1983-2006 PW80 or 1986-1990 BW80. Designed as a high-quality replacement, these piston rings for Yamaha ensure your engine operates with optimal efficiency. This set is specifically sized for engines requiring a .020 over bore to compensate for slight cylinder wear.

Built For Performance

• Engineered for precise oil control
• Constructed from high-tensile material
• Designed for high-heat environments
• Provides consistent ring tension
• Resistant to thermal fatigue

Fits These Machines

• for Yamaha 1983-2006 PW80
• for Yamaha 1986-1990 BW80

On-The-Job Use

• Restoring engine compression during top-end rebuilds
• Improving fuel efficiency in small displacement motors
• Eliminating blow-by in slightly worn cylinder bores

Specs At A Glance

Good To Know

Q: How do I identify my bore size? A: Measure the cylinder diameter with a micrometer or bore gauge to confirm the specific oversize needed.

Q: Can these be used on standard bores? A: No, these are sized for a .020 over bore and will not seal correctly in a standard cylinder.

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