03.6519 Pro-X Connecting Rod Kit for KTM Duke II 640 LC4 1998-2007

Pro-X Connecting Rod Kit for KTM Duke II 640 LC4

This Pro-X connecting rod kit (OEM cross-reference 03.6519) is a complete replacement rod assembly for rebuilding the bottom end of the KTM Duke II 640 LC4 engine.

Overview

This Pro-X connecting rod kit for KTM Duke II 640 LC4 models delivers a complete bottom-end rod assembly for engine rebuilds. The connecting rod kit is built to stock dimensions so it drops into the 640 LC4 crank during a top and bottom end refresh. Riders and shops rebuilding a tired Duke II reach for a connecting rod kit that matches original fitment.

Built For Performance

• Complete kit includes rod, bearing, and crankpin for a full lower-end rebuild
• Machined to stock 640 LC4 dimensions for drop-in fitment
• Forged construction for strength under high-rpm single-cylinder use
• Cross-references OEM part 03.6519
• Designed for the KTM 640 LC4 engine platform

Fits These Machines

• for KTM Duke II 640 LC4
• for KTM 640 LC4 models 1998-2007

On-The-Job Use

• Bottom-end rebuilds on high-mileage 640 LC4 engines
• Race engine refreshes between seasons
• Crank service after rod bearing wear or noise
• Engine rebuilds during top-end overhauls

Specs At A Glance

Good To Know

Q: What is included in this kit? A: The kit provides a connecting rod along with its matching bearing and crankpin for the lower-end assembly. Confirm the parts against your engine before pressing the crank together.

Q: Can I install this myself? A: Crank assembly and rod fitting require a press and proper balancing, so a qualified engine machinist is recommended for installation. Verify the rod matches your 640 LC4 crank before assembly.

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