The PROX 03.2423 Connecting Rod Kit is engineered to restore dependable bottom-end performance in select Yamaha four-stroke motorcycles. Manufactured by PROX to original-equipment specifications and tolerances, this kit is designed as a direct-fit replacement for the connecting rod assembly in compatible Yamaha YZ450F and WR450F models.
Built from high-strength alloy materials, the PROX connecting rod is designed to withstand the demanding loads and operating conditions associated with motocross, off-road, and high-performance riding. The complete kit includes the connecting rod, crankpin, big-end bearing, small-end bearing, and washers, providing the essential components needed for a comprehensive crankshaft rebuild. Precision manufacturing supports proper fit, smooth operation, and long-term durability when installed with properly inspected mating components.
Fitment includes 2003–2005 Yamaha YZ450F models and 2003–2006 Yamaha WR450F models. Verify the motorcycle year, model, crankshaft configuration, and service requirements before installation. This PROX connecting rod kit is supplied under manufacturer part number 03.2423 and is intended for professional-quality engine repair or rebuild applications.
Features:
- High-strength alloy construction for demanding engine operating conditions
- Manufactured to original-equipment specifications and tolerances
- Complete kit includes crankpin, big-end bearing, small-end bearing, and washers
- Fits 2003–2005 Yamaha YZ450F models
- Fits 2003–2006 Yamaha WR450F models
- Manufacturer: PROX
- Manufacturer part number: 03.2423
Fitment:
2003 Yamaha WR450F
2003 Yamaha YZ450F
2004 Yamaha WR450F
2004 Yamaha YZ450F
2005 Yamaha WR450F
2005 Yamaha YZ450F
2006 Yamaha WR450F