Connecting Rod

Upgrade your 125cc 2-stroke rebuild with a complete, ready-to-install PROX connecting rod kit. This forged-steel rod is designed to restore crankshaft performance and reliability when servicing a worn or damaged bottom end. Because the kit includes the critical wear components, it helps reduce downtime and ensures you have the correct matched parts for assembly.

Whether you’re refreshing a race bike or keeping an enduro machine dependable, a quality connecting rod assembly helps maintain smooth running, consistent compression, and long-term engine durability.

Key features:

• ✅ Complete kit – comes with crankpin, big-end bearing, small-end bearing, and washers
• ✅ Forged steel rod – strong material choice for demanding engine loads
• ✅ Easy to install – ideal for scheduled rebuilds and repairs

Benefits of use:

• 🔹 Reliable rebuild solution – replaces common bottom-end wear components in one kit
• 🔹 Consistent engine operation – supports smoother crank rotation and dependable performance
• 🔹 Time-saving purchase – no need to source pin/bearings/washers separately

Technical specifications:

• 📌 Type: Barreled rod
• 📌 Big end bore: 29.00 mm | Big end width: 17.00 mm
• 📌 Pin end bore: 19.00 mm | Pin end width: 17.00 mm
• 📌 Length: 137.00 mm | Center-to-center length: 104.00 mm
• 📌 Shaft length: 80.00 mm
• 📌 Engine: 125 cc, 2-stroke
• 📌 Material: Forged steel
• 📌 Brand: PROX | Vendor part number: 03.4223

Why choose this product?

• ⭐ Forged-steel construction for durability in high-load 2-stroke use
• ⭐ Complete kit contents simplify ordering and rebuilding
• ⭐ Ideal for preventive maintenance and repair-focused engine rebuilds