03.2400 Pro-X Connecting Rod Kit for Yamaha YZ400F WR400F 1998-2000

Pro-X Connecting Rod Kit for Yamaha YZ400F & WR400F

This Pro-X connecting rod kit is a complete bottom-end rebuild component for Yamaha YZ400F and WR400F models, restoring the crank assembly so the engine can handle compression and RPM loads again.

Overview

This Pro-X connecting rod kit for Yamaha is built to replace a worn or stretched rod in the YZ400F and WR400F engines. The Pro-X connecting rod kit includes the rod itself along with the necessary bearing and pin components for a proper crank rebuild. It suits riders and mechanics rebuilding a tired bottom end who want a reliable connecting rod kit for Yamaha dirt bikes without sourcing individual pieces.

Built For Performance

• Manufactured as a direct replacement for the original connecting rod assembly
• Forged and heat-treated steel construction for strength under high RPM loads
• Includes rod, bearing, and pin for a complete rebuild
• Machined to precise tolerances for proper crank fitment
• Balanced to suit the YZ400F and WR400F engine configuration
• Designed for use with the stock crankshaft assembly

Fits These Machines

• for Yamaha YZ400F 1998
• for Yamaha YZ400F 1999
• for Yamaha YZ400F 2000
• for Yamaha WR400F 1998
• for Yamaha WR400F 1999
• for Yamaha WR400F 2000

On-The-Job Use

• Bottom-end rebuilds after crank or rod failure
• Top-end tear-downs where the rod shows wear or play
• Restoring older YZ400F and WR400F motocross and enduro bikes
• Preventive replacement during a full engine refresh

Specs At A Glance

Good To Know

Q: Does this kit include the bearing and pin? A: Yes, the Pro-X connecting rod kit is supplied as a complete assembly with the rod, bearing, and pin for the crank rebuild.

Q: Can I install this without splitting the cases? A: No, connecting rod replacement requires splitting the crankcases and pressing the crank assembly apart, so specialist tools and experience are recommended.

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