Namura Top End Kit fits Kawasaki Ultra 150 & 1200 STX-R .020 Over Bore 80.5mm

Namura Top End Kit for Kawasaki

This top end kit for Kawasaki Ultra 150 and 1200 STX-R watercraft provides a .020 over bore at 80.5mm, delivering increased displacement and performance.

Overview

The Namura Top End Kit for Kawasaki Ultra 150 and 1200 STX-R is a high-performance replacement set that boosts engine displacement by .020 over bore to 80.5mm. Designed for riders seeking more power, this kit includes pistons and rings for a complete top-end rebuild.

Built For Performance

• Manufactured to precise specifications for consistent compression and power output
• Includes .020 over bore pistons at 80.5mm for increased displacement
• Durable ring pack ensures reliable sealing and long service life
• Designed for use with stock cylinder heads and crankshafts
• Precision-machined components for easy installation and tight tolerances

Fits These Machines

• for Kawasaki Ultra 150
• for Kawasaki 1200 STX-R

On-The-Job Use

• Ideal for rebuilding Kawasaki personal watercraft engines for racing or recreational use
• Commonly used when increasing engine displacement for improved acceleration and top speed
• Suitable for both freshwater and saltwater applications

Specs At A Glance

Good To Know

Q: Will this kit fit a standard Kawasaki Ultra 150? A: This kit is designed for .020 over bore, so the cylinder must be bored to 80.5mm; it will not fit a stock bore engine.

Q: Does the kit include wrist pins and circlips? A: Typically top end kits include pistons, rings, wrist pins, and retaining clips, but please verify the exact contents with Namura.

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