03.2025 Pro-X Connecting Rod Kit for Yamaha RD250 RD350 Air Cooled 1973-1975

Pro-X Connecting Rod Kit for Yamaha RD250 and RD350 Air Cooled

This Pro-X connecting rod kit is a replacement crank assembly component for the air-cooled 1973-1975 Yamaha RD250 and RD350, providing a fresh rod and bearing set for engine rebuilds.

Overview

The Pro-X Connecting Rod Kit for Yamaha RD250 and RD350 Air Cooled supplies a replacement connecting rod assembly for two-stroke crank rebuilds. Each kit restores the rod-to-crankshaft link so a tired bottom end can return to service. It suits owners and shops working on classic air-cooled Yamaha RD twins.

Built For Performance

• Pro-X connecting rod kit intended for the air-cooled 1973-1975 Yamaha RD250 and RD350
• Includes connecting rod, lower rod bearing, and thrust washers
• Machined from quality steel for dependable two-stroke operation
• Balanced and sized to match factory crank dimensions
• Listed under Pro-X part number 03.2025
• Positive-fitting small end and big end bores

Fits These Machines

• for Yamaha RD250 Air Cooled 1973
• for Yamaha RD250 Air Cooled 1974
• for Yamaha RD250 Air Cooled 1975
• for Yamaha RD350 Air Cooled 1973
• for Yamaha RD350 Air Cooled 1974
• for Yamaha RD350 Air Cooled 1975

On-The-Job Use

• Bottom-end rebuilds on air-cooled Yamaha RD twins
• Restoring a vintage crankshaft during engine overhaul
• Refreshing the rod assembly after piston or ring work
• Shop-level service on classic two-stroke Yamaha engines

Specs At A Glance

Good To Know

Q: Is this kit compatible with both the RD250 and RD350? A: The kit is listed for the air-cooled 1973-1975 RD250 and RD350 models, so it covers both displacements in that production window.

Q: Can this rod kit be installed without splitting the crankcases? A: Connecting rod replacement normally requires crank removal and rebuilding, so crankcase disassembly and a press are generally needed.

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