03.4118 Pro-X Connecting Rod Kit for Kawasaki KX80 KX85 KX100 1998-2025

Connecting Rod Kit for Kawasaki KX80, KX85 & KX100

This Pro-X connecting rod kit is a complete crank rebuild component for Kawasaki KX80, KX85, and KX100 two-stroke engines, cross-referenced under part number 03.4118, and it supplies the rod, bearing, and pin needed to bring a worn bottom end back to spec.

Overview

This connecting rod kit for Kawasaki covers the small-bore KX two-stroke family from 1998 through 2025, giving riders a dependable replacement for a stretched or failed rod. The connecting rod kit for Kawasaki KX80, KX85, and KX100 engines is intended for full crank service, not just a top-end refresh. Each connecting rod kit is manufactured to original equipment dimensions so the crank trues up cleanly after pressing.

Built For Performance

• Forged steel rod body built to withstand high-rpm two-stroke stress
• Precision big-end bearing with caged rollers for smooth, stable rotation
• Hardened crankpin sized for a consistent press-fit during crank assembly
• Polished bearing surfaces to cut friction and heat
• Balanced rod geometry that helps limit vibration at race speeds
• Cross-references Pro-X part number 03.4118 for easy verification

Fits These Machines

• for Kawasaki KX80 1998 and later
• for Kawasaki KX85 1998-2025
• for Kawasaki KX100 1998-2025

On-The-Job Use

• Bottom-end rebuilds on KX80, KX85, and KX100 minis and superminis
• Race engine freshening between events or seasons
• Repairing a seized or noisy crank on a project bike
• Shop service work where a pressed crank needs new rod hardware

Specs At A Glance

Good To Know

Q: Can I install this rod kit without splitting the crank? A: No, the crank must be pressed apart and reassembled on a truing stand, so this job requires a press and truing tools or a qualified engine shop. Plan on replacing main bearings and seals while the cases are apart.

Q: Does this kit fit every year of KX85 and KX100? A: It is listed for 1998 through 2025 models, but small running changes happen across that span, so verify your engine and serial number before ordering. Checking the original rod number against 03.4118 is the safest confirmation.

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