03.2070 Pro-X Connecting Rod Kit for Yamaha RD400 1976-1979 RD 400

Pro-X Connecting Rod Kit for Yamaha RD400

This Pro-X connecting rod kit is a direct replacement assembly for the 1976-1979 Yamaha RD400, restoring the crankshaft-to-piston link with a fresh rod, bearing, and related hardware.

Overview

The Pro-X Connecting Rod Kit for Yamaha RD400 brings tired two-stroke bottom ends back to spec. Each kit supplies a replacement connecting rod assembly so the RD400 crank can be rebuilt with confidence. It suits riders and shops rebuilding classic Yamaha RD400 engines.

Built For Performance

• Pro-X connecting rod kit engineered as a direct replacement for the 1976-1979 Yamaha RD400
• Includes connecting rod, lower rod bearing, and thrust washers for a complete crank rebuild
• Machined from quality steel for reliable two-stroke service life
• Balanced and sized to match original crank dimensions
• Listed under Pro-X part number 03.2070 for easy reference
• Positive-fitting small end and big end bores

Fits These Machines

• for Yamaha RD400 1976
• for Yamaha RD400 1977
• for Yamaha RD400 1978
• for Yamaha RD400 1979

On-The-Job Use

• Top-end and bottom-end engine rebuilds
• Restoring a vintage Yamaha RD400 crankshaft
• Routine two-stroke refresh after piston or ring replacement
• Shop work on classic Yamaha twins

Specs At A Glance

Good To Know

Q: Does this kit fit both early and late RD400 models? A: The kit is listed for the 1976 through 1979 Yamaha RD400 range, so it covers the standard production years of that model.

Q: Is any machining required during installation? A: Rod kits are typically fitted as part of a crank rebuild, so crank pressing and balancing are commonly involved and should be left to a qualified engine shop.

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