03.4347 Pro-X Connecting Rod Kit for Kawasaki KX250F 2017-2020 KX 250F

Connecting Rod Kit for Kawasaki KX250F

This Pro-X connecting rod kit is a complete bottom-end rebuild component for the Kawasaki KX250F, cross-referencing part 03.4347, and it restores crank assembly geometry so the piston travels true under race conditions.

Overview

This connecting rod kit for Kawasaki KX250F supplies the rod, bearing, and pin needed to refresh a worn crankshaft bottom end on 2017 through 2020 models. Engine builders rely on this connecting rod kit during a full crank rebuild to bring rod clearance and alignment back into spec. It suits four-stroke motocross riders who want long crank life from their KX 250F.

Built For Performance

• Forged steel connecting rod built to handle four-stroke combustion loads
• Includes rod, lower bearing, and crankpin for a complete rebuild
• Machined big-end bore for consistent bearing fit
• Shot-peened surfaces to resist fatigue under repeated cycles
• Balanced to stock rod weight for predictable crank behavior

Fits These Machines

• for Kawasaki KX250F 2017
• for Kawasaki KX250F 2018
• for Kawasaki KX250F 2019
• for Kawasaki KX250F 2020

On-The-Job Use

• Bottom-end rebuilds on KX250F motocross bikes
• Crank refresh during routine race season maintenance
• Repair after a seized piston or bearing failure
• Shop rebuilds where stock rod geometry must be retained

Specs At A Glance

Good To Know

Q: Does this kit include the bearing and pin? A: Yes, a standard connecting rod kit ships with the rod, lower bearing, and crankpin for a complete bottom-end rebuild.

Q: Do I need to press the crank apart to install it? A: Yes, the crank must be disassembled and trued with a press, so a machine shop is recommended for most riders.

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