Wiseco Std Piston Crankshaft Gasket Set for Kawasaki KX250 2002-2003 66.40mm Bor

Wiseco Std Piston, Crankshaft & Gasket Set for Kawasaki KX250

This Wiseco standard piston, crankshaft, and gasket set is a complete top and bottom end rebuild kit for the Kawasaki KX250, sized at 66.40mm bore for a stock-fit rebuild.

Overview

This Wiseco Std Piston, Crankshaft & Gasket Set gives Kawasaki KX250 riders everything needed for a full engine rebuild in one box. The Wiseco piston, crankshaft, and gasket set matches the original 66.40mm bore size, so it drops into a stock cylinder without any machining or overbore work. It suits riders and mechanics rebuilding a worn or seized KX250 engine back to reliable running condition.

Built For Performance

• Standard 66.40mm bore piston sized to match the original cylinder dimensions
• Crankshaft assembly built for high-rpm two-stroke motocross use
• Complete gasket set covering top and bottom end reassembly
• Components matched as a set for consistent fit and clearances
• Forged piston construction for strength under repeated heat cycles
• Designed as a direct stock-replacement rebuild package

Fits These Machines

• for Kawasaki KX250 2002
• for Kawasaki KX250 2003

On-The-Job Use

• Full engine rebuild after a top end seize or bottom end failure
• Seasonal refresh for motocross race bikes
• Restoring a tired KX250 trail or track machine
• Shop work where piston, crank, and gaskets are replaced together

Specs At A Glance

Good To Know

Q: Does this kit require any cylinder machining? A: No, the standard 66.40mm bore piston is sized to fit the original cylinder, so no overbore or replating is needed as long as the cylinder is within spec.

Q: Can I install the piston, crankshaft, and gaskets together in one rebuild? A: Yes, this set is put together for a complete top and bottom end rebuild, so all three components are matched to work together during reassembly.

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