4920M07700 Wiseco Std Piston Kit for Kawasaki KX250F 2007-2009 77.00mm 13.5:1

Wiseco Std Piston Kit for Kawasaki KX250F

This Wiseco standard bore piston kit for Kawasaki KX250F models restores stock displacement with a 77.00mm bore and 13.5:1 compression ratio, cross-referenced to 4920M07700.

Overview

This Wiseco standard bore piston kit for Kawasaki KX250F models is a direct-fit replacement for a worn top end that keeps the factory 77.00mm bore size. The 13.5:1 compression ratio matches the stock spec, making this piston kit a straightforward option for racers and riders refreshing a KX250F engine. It is intended for those working on 2007-2009 KX250F machines who want a proven piston kit.

Built For Performance

• Standard 77.00mm bore keeps stock displacement
• 13.5:1 compression ratio matches factory spec
• Forged piston construction for durability at high rpm
• Wiseco 4920M07700 cross-reference for easy lookup
• Kit format includes piston, ring, pin, and clips

Fits These Machines

• for Kawasaki KX250F 2007
• for Kawasaki KX250F 2008
• for Kawasaki KX250F 2009

On-The-Job Use

• Top end rebuilds during regular maintenance
• Motocross and off-road racing requiring fresh compression
• Restoring performance after piston wear
• Shop work on 2007-2009 KX250F engines

Specs At A Glance

Good To Know

Q: Is this kit a direct fit without cylinder boring? A: Since it is a standard bore kit, it fits the original cylinder size without boring when the cylinder is still within spec. Have the bore measured and honed before installation to confirm clearances.

Q: What else should I plan for during install? A: A top end gasket kit, fresh coolant, and a torque wrench are typically needed along with this piston kit. Check ring end gap and piston-to-cylinder clearance during assembly.

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