Namura .020 Over Bore Top End Rebuild Kit for Kawasaki KX250 1993-2003 66.9mm

Namura .020 Over Bore Top End Rebuild Kit for Kawasaki

This top end rebuild kit is designed for a .020 over bore (66.9mm) on Kawasaki KX250 engines from 1993 to 2003. It includes a piston, rings, pin, and circlips to refresh a worn cylinder that has been bored to .020 oversize.

Overview

The Namura .020 Over Bore Top End Rebuild Kit provides a complete piston assembly for Kawasaki KX250 models, sized at 66.9mm to match a .020 overbore. This top end kit is essential for riders rebuilding a cylinder that cannot use a standard bore piston. With all needed components, this top end rebuild kit simplifies the engine overhaul process.

Built For Performance

• Includes piston, rings, pin, and circlips for .020 over bore
• 66.9mm diameter for 1993-2003 KX250
• Durable aluminum alloy piston casting
• Molybdenum-coated wrist pin for reduced wear
• Precision-machined ring grooves for stable compression

Fits These Machines

• for Kawasaki KX250 (1993-2003) with .020 overbore

On-The-Job Use

• Cylinder boring and engine rebuild services
• Motocross racing after cylinder damage
• Off-road trail riding with high-hour engines
• Competition engine refresh between seasons

Specs At A Glance

Good To Know

Q: Does this kit require my cylinder to be bored to .020 over? A: Yes, this kit is intended for a cylinder that has been professionally bored to 66.9mm. Do not use in a stock bore cylinder.

Q: What other parts should I replace when using this kit? A: Replace the wrist pin bearing and cylinder gaskets. Also check the piston-to-cylinder clearance and ring end gap before assembly.

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