Namura Piston Kit fits Kawasaki 1986-1991 JS 300 & SX 300 .020 Over Bore 76.5mm

Namura Piston Kit for Kawasaki

This Namura piston kit is a replacement piston assembly for Kawasaki JS300 and SX300 personal watercraft models from 1986 to 1991, featuring a 0.020 oversize bore of 76.5mm to restore cylinder compression.

Overview

The Namura piston kit is a high-quality replacement component designed for Kawasaki JS300 and SX300 jet skis. This Namura piston kit offers a 0.020 oversize bore of 76.5mm, allowing for cylinder overboring to restore performance and compression. It is an ideal choice for rebuilding Kawasaki 300 series engines from 1986 to 1991.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• Heat-treated for enhanced durability
• Includes piston rings, wrist pin, and circlips
• Oversized bore allows for cylinder overboring up to 0.020
• Tested for proper clearance and fit

Fits These Machines

• for Kawasaki JS300 (1986-1991)
• for Kawasaki SX300 (1986-1991)

On-The-Job Use

• Personal watercraft engine rebuilding
• Restoring compression in Kawasaki jet skis
• Overboring cylinders to eliminate scoring
• Performance restoration for aged 300 series engines

Specs At A Glance

Good To Know

Q: What is the recommended installation procedure for this piston kit? A: Always have a professional mechanic verify piston-to-wall clearance and ring gap. Follow the engine service manual for torque specs and break-in procedure.

Q: Does this Namura piston kit include all necessary hardware? A: Yes, this kit includes the piston, rings, wrist pin, and circlips for a complete piston assembly.

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