Fortify your two-stroke powerplant with the ProX Connecting Rod Kit (Part No. 03.1315). Manufactured in Japan from ultra-tough, double-forged alloy steels, this kit is engineered to withstand intense thermal and mechanical loads while meeting or exceeding strict OEM specifications for dependable durability.
Each rod is shot-peened and barrel-finished to completely eliminate surface micro-imperfections, relieve residual stress, and optimize structural grain flow for maximum fatigue resistance. Strategically placed lubrication slots ensure optimal oil feed and cooling to the big-end bearing, keeping your rotating assembly reliable under hard acceleration.
Vehicle Fitment
| Make | Model | Year Range | Specific Years |
| GasGas | EC 300 / XC 300 | 2000–2019 | 2000 through 2019 (Select years omitted by manufacturer) |
| Honda | CR250R | 1984–2001 | 1984 through 2001 |
| Rieju | MR 300 Racing / Pro | 2021 | 2021 |
Kit Contents:
- Forged Connecting Rod
- Crankpin
- Big-End Bearing
- Small-End (Wrist Pin) Bearing
- Thrust Washers (where applicable)
TSO Tip
When rebuilding your bottom end, always verify that your crankshaft total indicated runout (TIR) measures under 0.03mm on V-blocks before dropping the assembly back into the cases. Generously pre-lubricate the lower rod bearing with clean two-stroke premix oil during assembly to protect the moving parts the split-second the engine fires.
Compatibility
Fetching compatibility details...
| Year | Make | Model |
|---|---|---|
