2 Namura Piston Kits for Kawasaki 1982-1990 Jet Ski JS 550, SX 550 STD Bore 75mm

2 Namura Piston Kits for Kawasaki

These two Namura piston kits provide a direct replacement for 1982-1990 Kawasaki Jet Ski JS 550 and SX 550 models at standard bore size 75mm, delivering reliable performance for your personal watercraft.

Overview

These Namura piston kits are engineered to restore compression and power in Kawasaki Jet Ski engines. Each kit includes a piston, rings, and pin for a complete top-end rebuild. Ideal for JS 550 and SX 550 models, these piston kits revive worn-out cylinders.

Built For Performance

• High-quality cast aluminum pistons for durability
• Precision-machined ring grooves for proper seal
• Includes wrist pin and circlips for hassle-free installation
• OEM-spec dimensions ensure direct fitment
• Designed for water‑cooled two‑stroke engines

Fits These Machines

• for Kawasaki Jet Ski JS 550 (1982‑1990)
• for Kawasaki Jet Ski SX 550 (1982‑1990)

On-The-Job Use

• Restoring compression on personal watercraft
• Replacing worn or scored pistons
• Preparing a Jet Ski for racing or recreation
• Maintaining stock performance in vintage models

Specs At A Glance

Good To Know

Q: Are these piston kits compatible with aftermarket cylinders? A: These piston kits are designed for standard bore cylinders; verify cylinder condition before installation.

Q: Do the kits include all necessary hardware? A: Yes, each kit includes piston, rings, wrist pin, and circlips for a complete rebuild.

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