Namura Standard Bore Top End Kit Size B for Kawasaki KX250 fits 1993-2003 66.4mm

Standard Bore Top End Kit Size B for Kawasaki KX250

This top end kit includes a piston, rings, and gaskets to rebuild the cylinder of a Kawasaki KX250 engine with a 66.4mm bore.

Overview

This Standard Bore Top End Kit Size B is a complete set of components for restoring the upper cylinder on a Kawasaki KX250 from 1993 to 2003. The kit contains a 66.4mm piston, rings, wrist pin, and gaskets to refresh the top end and restore compression. Designed for off-road racing, this top end kit delivers reliable power and durability.

Built For Performance

• 66.4mm bore piston matched to cylinder tolerance
• High-strength rings for consistent seal
• Includes head gasket, base gasket, and exhaust gasket
• Precision-machined wrist pin with circlips
• Tested for wear resistance in high-RPM environments

Fits These Machines

• for Kawasaki KX250 1993-2003

On-The-Job Use

• Motocross racing and trail riding on Kawasaki KX250
• Rebuilding top end after wear or piston failure
• Competition and recreational off-road use

Specs At A Glance

Good To Know

Q: Does this kit include the cylinder? A: No, this top end kit includes only the piston assembly and gaskets; the cylinder must be inspected and reused or replaced separately.

Q: Can I use this kit for a 2004 model? A: This kit is specifically for 1993-2003 Kawasaki KX250 models; later years may have different cylinder dimensions.

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