4 Namura Standard Bore Size B Piston Kits for Kawasaki Jet Ski STX-12F 83mm

4 Namura Standard Bore Size B Piston Kits for Kawasaki Jet Ski STX-12F 83mm

This set of four Namura standard bore size B piston kits provides a direct replacement for Kawasaki Jet Ski STX-12F models, restoring compression and power with 83mm bore diameter.

Overview

These four Namura standard bore size B piston kits are designed for Kawasaki Jet Ski STX-12F watercraft, featuring a precise 83mm bore. Each kit includes a piston, rings, and wrist pin for a complete top-end rebuild. The kits deliver reliable performance for personal watercraft engines.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• Includes piston rings and wrist pin for complete installation
• Standard bore size B ensures proper fitment for 83mm bore
• Designed for long service life in high-revving jet ski engines
• Direct replacement for OEM components

Fits These Machines

• for Kawasaki Jet Ski STX-12F

On-The-Job Use

• Engine rebuilding for personal watercraft
• Replacing worn pistons to restore compression
• Performance restoration after top-end failure
• Routine maintenance for high-hour engines

Specs At A Glance

Good To Know

Q: Are these pistons pre-assembled? A: Each kit includes piston, rings, and wrist pin; rings must be installed on the piston following the manufacturer's gap orientation.

Q: What is the difference between standard bore size B and C? A: Size B and C indicate different piston diameters within the same 83mm bore class; confirm your cylinder measurement before ordering.

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