843M06640 Wiseco Std Piston Kit for Kawasaki KX250 2005-2008 66.40mm Bore

Wiseco Std Piston Kit for Kawasaki KX250

This Wiseco Std Piston Kit 843M06640 is a 66.40 mm standard bore piston assembly that restores compression and top end power in Kawasaki KX250 motocross bikes.

Overview

The Wiseco Std Piston Kit 843M06640 gives riders a 66.40 mm standard bore replacement piston for the Kawasaki KX250. It renews top end sealing and compression so the engine pulls cleanly through the rev range. This piston kit suits racers and weekend riders rebuilding after hours of track and trail use.

Built For Performance

• Standard 66.40 mm bore size for stock cylinder dimensions
• Forged piston construction for strength under high rpm loads
• Kit format supplies the piston and matching components for one top end rebuild
• Machined ring grooves and skirt profile for consistent cylinder sealing
• Balanced for the 2005 to 2008 KX250 engine architecture

Fits These Machines

• for Kawasaki KX250 2005
• for Kawasaki KX250 2006
• for Kawasaki KX250 2007
• for Kawasaki KX250 2008

On-The-Job Use

• Top end rebuilds on a worn KX250 engine
• Refreshing compression before race season
• Routine maintenance after extended motocross track hours
• Restoring piston-to-cylinder sealing on a stock bore engine

Specs At A Glance

Good To Know

Q: Is this a standard bore piston? A: Yes, this kit uses a 66.40 mm standard bore size that matches the stock cylinder on the 2005-2008 KX250. Confirm your cylinder dimension before ordering.

Q: Does the kit include everything for a top end rebuild? A: This is a piston kit, so it covers the piston and associated parts shown for the listed application. Check whether gaskets and a wrist pin bearing are needed separately for your rebuild.

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