03.2423 Pro-X Connecting Rod Kit for Yamaha YZ450F 2003-2005

Connecting Rod Kit for Yamaha YZ450F

This Pro-X connecting rod kit rebuilds the crankshaft bottom end on the Yamaha YZ450F, restoring a worn or stressed rod to factory-spec strength with OEM cross-reference 03.2423.

Overview

This Pro-X connecting rod kit is a complete bottom-end rebuild solution for the Yamaha YZ450F, supplying a fresh rod, bearing, and pin to bring a tired crankshaft back to spec. Riders and mechanics choose this connecting rod kit when a rebuild calls for proven strength rather than guesswork. It serves anyone restoring a high-hour four-stroke motocross engine.

Built For Performance

• Forged steel connecting rod for high-rpm four-stroke loads
• Caged needle bearing and hardened crank pin included for one-stop assembly
• Precision-machined big-end bore for consistent oil clearance
• Balanced to stock dimensions for direct replacement fit
• OEM cross-reference 03.2423 for easy parts verification

Fits These Machines

• for Yamaha YZ450F 2003
• for Yamaha YZ450F 2004
• for Yamaha YZ450F 2005

On-The-Job Use

• Top-end and bottom-end engine rebuilds after bearing wear
• Crankshaft service during routine high-hour maintenance
• Restoring seized or knocking four-stroke engines
• Race engine refresh between seasons

Specs At A Glance

Good To Know

Q: Does this kit include the bearing and pin? A: Yes, the kit ships with the rod, caged bearing, and crank pin so the big end can be assembled in one go. Q: Can I install this without pressing the crank apart? A: No, fitting a connecting rod requires splitting the crank, so a press and proper truing tools are needed.

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