Pro-X Connecting Rod Kit for Yamaha MX125 1974-1976 MX 125

Connecting Rod Kit for Yamaha MX125

This Pro-X connecting rod kit is built for the Yamaha MX125 and delivers the rod, bearing, and pin needed to rebuild the bottom end of the 125cc two-stroke engine.

Overview

This Pro-X connecting rod kit is made for the Yamaha MX125 and supplies the core parts for a crankshaft rebuild. It replaces a stretched, worn, or damaged rod so the engine can spin true again. It suits riders and shops restoring or racing the 1974 through 1976 MX125.

Built For Performance

• Pro-X connecting rod kit made for the Yamaha MX125 bottom end
• Includes rod, big-end bearing, and crank pin for a complete rebuild
• Forged and heat-treated rod for strength under two-stroke load
• Precision-ground bearing surfaces for smooth rotation at high rpm
• Designed to match the 1974, 1975, and 1976 MX125 engine

Fits These Machines

• for Yamaha MX125, 1974
• for Yamaha MX125, 1975
• for Yamaha MX125, 1976

On-The-Job Use

• Crankshaft rebuilds on the Yamaha MX125 two-stroke
• Bottom-end refresh on a vintage motocross bike
• Repair after a seized or noisy big-end bearing
• Restoration work on 1970s Yamaha MX machines

Specs At A Glance

Good To Know

Q: Does this kit include everything for a rod replacement? A: The kit supplies the rod, bearing, and pin, and a press and truing stand are typically needed to fit it to the crank.

Q: Is balancing or truing required after installation? A: Yes, the crank should be trued and checked for runout after pressing the new rod in for smooth, reliable operation.

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