40133M10100 Wiseco Piston Kit for Kawasaki KLX 650 2001-2003 101 mm 9.5:1

Wiseco .040 Piston Kit for Kawasaki KLX 650

This Wiseco .040 piston kit for Kawasaki KLX 650 replaces the worn top end with a 101 mm bore piston rated at 9.5:1 compression, cross-referenced under 40133M10100. The Wiseco piston kit delivers a rebuild-ready assembly that restores compression and reliable power for riders running a 2003-2001 Kawasaki KLX 650.

Overview

This Wiseco .040 piston kit is a 101 mm, 9.5:1 compression rebuild assembly made for the 2003-2001 Kawasaki KLX 650. The Wiseco piston kit restores worn cylinder sealing so the engine holds compression and produces dependable power. It suits riders and mechanics doing a top-end refresh on a Kawasaki KLX 650.

Built For Performance

• 101 mm bore diameter with .040 oversize sizing
• 9.5:1 compression ratio rating for the KLX 650
• Wiseco skirt and ring design for stable sealing
• Cross-reference 40133M10100 for simplified lookup
• Rebuild assembly ready for bore-matched installation

Fits These Machines

• for Kawasaki KLX 650 2003
• for Kawasaki KLX 650 2002
• for Kawasaki KLX 650 2001

On-The-Job Use

• Top-end rebuild after a seized or scored piston
• Compression restoration on a high-hour KLX 650 engine
• Cylinder rebore matched to .040 oversize
• Trail and dual-sport riding service

Specs At A Glance

Good To Know

Q: Does this piston kit need a cylinder rebore? A: Yes, a .040 oversize piston requires the cylinder bored and honed to the matching 101 mm clearance. Q: Are gaskets included with the piston kit? A: This listing covers the piston kit itself, so check your top-end gasket set separately 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.