KTM LC4 400/540/620/625/640/660 SX, SC, SXC, Adventure, Duke, Competition, SMC Engine Workshop Service Repair Manual (1998-2003)

If you service or repair the KTM LC4 400/540/620/625/640/660 SX, SC, SXC, Adventure, Duke, Competition, SMC Engine (1998–2003), this manual puts the repair steps, adjustment values and system information in a single file you can keep on a laptop, tablet or phone at the workbench.

What's inside

• Removing and refitting the engine
• Disassembling the engine
• Servicing individual components
• Assembling the engine
• Electrical
• Fuel system
• Trouble shooting
• Technical specifications by model year and variant
• Periodic maintenance schedule
• Wiring diagrams

Models covered

• 400/540 SXC
• 400/620 SX/SC
• 620 LC4 Competition
• 400/640 LC4
• 640 Adventure-R
• 640 Duke
• 660 SMC

User help

1. Make sure it matches your machine. Look up your model and serial number and year and compare them with the coverage above. Not sure? Send us those details and we will help you check before you buy.
2. Get the file. This is a digital PDF download. Nothing is shipped, so you can start using it as soon as you have the file.
3. Open it anywhere. Use any current PDF reader (Adobe Acrobat Reader, your browser, or a phone or tablet app). Save a copy to your computer and to a backup drive.
4. Jump straight to the section you need. Start from the table of contents or search for a part name, fault code or value, then print just those pages for the workshop.
5. Work step by step. Read the safety notes for a procedure before you start, follow the stated torque values and sequences, and use the specification and test sections to confirm a fault before replacing parts.
6. Stay safe. Repairs on engines, hydraulics, fuel and electrical systems can be dangerous. Follow the safety instructions in the document, use proper tools and support equipment, and follow local regulations.

KTM and all model names are trademarks of their respective owners and are used here only to identify compatibility. This store is an independent seller and is not affiliated with or endorsed by KTM. For informational and maintenance use.