03.4309 Pro-X Connecting Rod Kit for Kawasaki KX250 KX 250 1978-2008

Pro-X Connecting Rod Kit for Kawasaki KX250

The Pro-X Connecting Rod Kit restores the bottom end of your Kawasaki KX250, giving the crank a fresh, sturdy link between piston and crankshaft, and it is built to OEM-style geometry for a dependable rebuild.

Overview

This Pro-X connecting rod kit delivers the critical bottom-end hardware for rebuilding a Kawasaki KX250 engine. Riders and mechanics use this connecting rod kit to replace a worn, stretched, or damaged rod before it takes the crank with it. It is a straightforward choice for anyone refreshing a tired two-stroke bottom end during a top-end or full engine service.

Built For Performance

• Forged and heat-treated steel rod for high-rpm two-stroke stress
• Includes big-end bearing, thrust washers, and crank pin
• Balanced to OEM-style rod length and pin sizing for proper timing
• Silver-plated cage surfaces for dependable oil retention
• Prepared for press-fit crank assembly, matching stock dimensions

Fits These Machines

• for Kawasaki KX250 1978
• for Kawasaki KX250 1979
• for Kawasaki KX250 1980
• for Kawasaki KX250 through 2008 model years

On-The-Job Use

• Bottom-end rebuilds after a seized or seized-adjacent piston
• Motocross and off-road engine overhauls
• Restoring vintage KX250 race bikes
• Shop-level crank truing and reassembly work

Specs At A Glance

Good To Know

Q: Do I need to press the crank apart to install this connecting rod kit? A: Yes, the crank must be pressed apart and re-trued during assembly, so this job needs a hydraulic press and dial indicator or a machine shop.

Q: Do I need any other parts when replacing the connecting rod? A: Plan on new crank bearings, seals, and a fresh top-end kit as well, since the cases have to be split anyway.

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