607M06850 Wiseco 1.10 mm Piston Kit 68.50 mm for Kawasaki KX250 1990-1991

Wiseco 1.10 mm Piston Kit for Kawasaki KX250

This Wiseco 1.10 mm overbore piston kit for Kawasaki KX250 fits 1990 to 1991 models with a 68.50 mm bore size, cross-referenced under part number 607M06850.

Overview

This Wiseco 1.10 mm piston kit for Kawasaki KX250 is a 68.50 mm oversize top-end replacement for engines that need a rebore. The kit carries Wiseco part number 607M06850 and is intended for riders and mechanics rebuilding 1990 to 1991 KX250 machines. Fitting a Wiseco 1.10 mm piston kit for Kawasaki KX250 refreshes compression and restores dependable two-stroke power.

Built For Performance

• 68.50 mm bore size matched to a 1.10 mm overbore
• Forged piston construction built for high-rpm two-stroke service
• Wiseco reference number 607M06850 for easy cross-checking
• Includes piston, rings, wrist pin, and circlips for a full top-end job
• Designed for the 1990 to 1991 Kawasaki KX250 engine platform

Fits These Machines

• for Kawasaki KX250 1990
• for Kawasaki KX250 1991

On-The-Job Use

• Top-end rebuilds on 1990 to 1991 KX250 engines after cylinder wear
• Rebores where the stock bore no longer cleans up at standard size
• Motocross maintenance when compression and power fall off
• Shop or home garage rebuilds requiring an oversize piston

Specs At A Glance

Good To Know

Q: Does this kit include rings and a wrist pin? A: Yes, this Wiseco top-end kit ships with the piston, rings, wrist pin, and circlips needed for installation. Q: Can I fit this piston without machining the cylinder? A: No, a 1.10 mm overbore piston requires the cylinder to be bored and honed to the matching 68.50 mm size 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.