Give your bottom end a reliable foundation with the ProX Connecting Rod Kit (Part No. 03.4218). Engineered to meet or exceed strict OEM specifications, ProX rods are double-forged from ultra-tough Japanese alloys to ensure superior dimensional consistency, grain flow, and fatigue resistance under high-RPM racing conditions.
Shot-peened and barrel-finished to remove residual surface stress, this kit features strategically placed lubrication grooves to maximize big-end bearing life and oil distribution where it matters most. A complete drop-in solution designed to restore bottom-end reliability to your two-stroke.
Vehicle Fitment
| Make | Model | Year Range | Specific Years |
| Kawasaki | KX125 | 1998–2002 | 1998, 1999, 2000, 2001, 2002 |
Kit Contents:
- Forged Connecting Rod
- Crankpin
- Big-End Bearing
- Small-End Bearing
- Thrust Washers (where applicable)
TSO Tip
When rebuilding your KX125 bottom end with a fresh ProX rod, always check your crankshaft runout on V-blocks with a dial indicator before dropping it back into the cases—aim for well under factory spec (ideally less than 0.03mm) to eliminate high-RPM vibration. Always clean and oil your lower rod bearing thoroughly with clean two-stroke oil during assembly, and never reuse old thrust washers.
Compatibility
Fetching compatibility details...
| Year | Make | Model |
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