Wrist Pin Bearings for Yamaha RD 350 RD350 1973-1975

Wrist Pin Bearings for Yamaha RD 350

These wrist pin bearings are replacement small end bearings for the Yamaha RD 350, sized to fit the piston pin bore on RD350 twins built between 1973 and 1975.

Overview

These wrist pin bearings support the small end of the connecting rod on the Yamaha RD 350, letting the piston pin rotate smoothly under load. Built for 1973 to 1975 RD350 twins, they are a direct replacement for worn or noisy small end bearings during a top end rebuild. Riders and rebuilders working on a vintage Yamaha RD 350 will find these wrist pin bearings sized for the stock piston pin bore.

Built For Performance

• Roller bearing design sized for the RD 350 small end bore
• Hardened steel rollers and cage material for high rpm service
• Fits the stock piston pin diameter used on 1973 to 1975 RD350 twins
• Suited to two stroke top end rebuilds and piston replacement jobs
• Sold as a set to service both cylinders on a twin

Fits These Machines

• for Yamaha RD 350 1973
• for Yamaha RD 350 1974
• for Yamaha RD 350 1975

On-The-Job Use

• Top end rebuilds on vintage Yamaha RD350 twins
• Piston and ring replacement jobs
• Crank and connecting rod service
• Restoration projects on 1970s two stroke street bikes

Specs At A Glance

Good To Know

Q: How many wrist pin bearings do I need for an RD 350 twin? A: A twin uses one small end bearing per cylinder, so order two sets for a complete top end rebuild. Confirm your model year and bore size before ordering.

Q: Should wrist pin bearings be replaced during a top end rebuild? A: Yes, worn small end bearings cause noise and can damage the piston pin, so replacing them while the cylinder is off is standard practice.

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