03.2225 Pro-X Connecting Rod Kit for Yamaha YZ125X YZ 125X 2020-2022

Connecting Rod Kit for Yamaha YZ125X

This Pro-X connecting rod kit is a complete bottom-end rebuild component designed to restore crank assembly function on the Yamaha YZ125X, cross-referencing Pro-X part number 03.2225.

Overview

This connecting rod kit for Yamaha YZ125X delivers the rod, bearing, and related hardware needed to rebuild a worn or failed bottom end. Built as a direct replacement for the original rod assembly, this Pro-X connecting rod kit for Yamaha YZ125X keeps the crank spinning true through the full rev range on the track.

Built For Performance

• Forged steel rod construction for high-rpm strength
• Precision-machined big-end and small-end bores
• Includes caged roller bearing for the big end
• Hardened and polished thrust surfaces
• Balanced to OEM rod weight specifications
• Corrosion-resistant finish on rod and hardware

Fits These Machines

• for Yamaha YZ125X 2020
• for Yamaha YZ125X 2021
• for Yamaha YZ125X 2022

On-The-Job Use

• Bottom-end rebuilds on YZ125X motocross bikes
• Top-end teardowns that reveal rod wear or play
• Crank truing and reassembly shops
• Pre-season engine refreshes for racing
• Restoring a seized or knocking bottom end

Specs At A Glance

Good To Know

Q: Does this kit include the crank pin and bearing? A: Yes, Pro-X connecting rod kits ship with the rod, big-end bearing, and crank pin as a matched set for the YZ125X bottom end.

Q: Can I install this without splitting the cases? A: No, replacing a connecting rod requires pressing the crank apart and truing it afterward, so the engine cases must be split.

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