2 Namura Piston Ring Kits for Kawasaki 1982-1990 JS SX 550 .020 Over Bore 75.5mm

2 Namura Piston Ring Kits for Kawasaki JS SX 550

These two Namura piston ring kits are designed for Kawasaki JS SX 550 models from 1982 to 1990, with a .020 over bore and 75.5mm diameter for rebuilding worn cylinders. Each kit contains high-quality rings that restore compression and improve engine performance in jet skis. This piston ring set is intended for use with matching overbore pistons.

Overview

These Namura piston ring kits are a .020 overbore solution for Kawasaki JS SX 550 engines built between 1982 and 1990, featuring a 75.5mm bore size. They restore proper sealing and compression in worn cylinders, making them ideal for rebuilds on stand-up and sit-down jet skis. Each kit includes two rings per piston, precision-ground for consistent tension and wear resistance.

Built For Performance

• Namura brand rings manufactured from ductile iron for durability
• .020 over size compensates for cylinder wear
• 75.5mm bore diameter matched to overbore pistons
• Reduces oil consumption and blow-by
• Includes both compression and oil control rings per kit

Fits These Machines

• for Kawasaki JS SX 550 (1982-1990)

On-The-Job Use

• Top-end engine rebuilds for personal watercraft
• Restoring performance after piston seizure or wear
• Competition and recreational jet ski use
• Overhauling engines with scored cylinder walls

Specs At A Glance

Good To Know

Q: Do I need to hone the cylinder before installing these rings? A: Yes, always hone the cylinder to the correct crosshatch pattern to ensure proper ring seating and oil retention.

Q: Can these rings be used with standard bore pistons? A: No, they are designed for .020 overbore pistons; using them with standard pistons will result in improper fit and sealing.

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