Namura .040 Over Bore Piston Kit for Sea-Doo 580 PWC 1990-1996 77mm SEE LIST

.040 Over Bore Piston Kit for Sea-Doo

This .040 over bore piston kit is designed for Sea-Doo 580 PWC models from 1990 to 1996, restoring engine compression and performance with a precise 77mm piston diameter. OEM cross-reference numbers are listed in the accompanying fitment guide for easy verification.

Overview

This .040 over bore piston kit for Sea-Doo 580 PWC provides a direct replacement to rejuvenate worn engines, offering a reliable solution for boosting power and efficiency. The kit includes a high-quality piston and rings, engineered to meet original specifications for a seamless installation.

Built For Performance

• Precision-machined 77mm piston for exact fitment
• Durable ring set reduces blow-by and oil consumption
• Heat-treated alloy withstands high combustion temperatures
• Coated skirt minimizes friction and wear
• Balanced design reduces vibration for smoother operation

Fits These Machines

• for Sea-Doo 580 PWC (1990-1996)

On-The-Job Use

• Rebuilding Sea-Doo 580 engines after top-end wear
• Replacing piston due to scoring, seizure, or loss of compression
• Restoring performance in vintage PWC for recreational use
• Engine overhaul projects requiring a .040 over bore size

Specs At A Glance

Good To Know

Q: Can I use this piston kit for a different overbore size? A: No, this kit is specifically .040 over bore; using it with a different bore will cause poor fitment and potential engine damage. Always verify your cylinder bore before ordering.

Q: Does this kit include wrist pins and circlips? A: The kit includes the piston and rings – wrist pins and circlips may need to be sourced separately depending on the specific model, so check your original components.

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