834M05400 Wiseco Std Piston Kit for Kawasaki KX125 2004-2008 54.00mm Bore

Wiseco Std Piston Kit for Kawasaki KX125

This Wiseco standard bore piston kit for Kawasaki KX125 restores top end compression with a 54.00 mm forged piston, and it carries the Wiseco 834M05400 part number for a direct reference match.

Overview

This Wiseco piston kit for Kawasaki KX125 is a standard bore top end replacement built to bring compression and throttle response back to a worn two stroke. The kit includes the piston along with the components needed for a top end rebuild, making it a practical choice for riders and mechanics servicing a 2004 to 2008 machine. The 54.00 mm standard bore size means no cylinder boring is required when the bore is still within spec.

Built For Performance

• Forged piston construction for strength under high rpm two stroke loads
• Standard 54.00 mm bore size matches the stock cylinder when still in spec
• Wiseco 834M05400 part number for straightforward cross reference
• Kit format supplies the piston plus matching top end components
• Designed around the Kawasaki KX125 2004 to 2008 engine platform

Fits These Machines

• for Kawasaki KX125 2004
• for Kawasaki KX125 2005
• for Kawasaki KX125 2006
• for Kawasaki KX125 2007
• for Kawasaki KX125 2008

On-The-Job Use

• Top end rebuilds when compression has dropped on a high hour KX125
• Routine piston replacement during scheduled engine service
• Fresh bores that measure within the standard 54.00 mm specification
• Motocross and trail riding where consistent power delivery matters

Specs At A Glance

Good To Know

Q: Does this kit require cylinder boring? A: No, this is a standard bore piston kit at 54.00 mm, so it fits a cylinder that is still within the stock bore specification. Measure the bore before ordering to confirm it has not been oversized.

Q: Is this an original Kawasaki part? A: No, this is a Wiseco piston kit referenced by part number 834M05400 for the Kawasaki KX125. It is an aftermarket replacement, not a factory Kawasaki item.

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