KTM 400–660 LC4 1998–2003 Service Repair Workshop Manual | PDF Download

The KTM 400, 620, 640 & 660 LC4 1998–2003 Service Repair Manual is the official factory service guide for KTM’s legendary LC4 series — the high-performance single-cylinder dual-sport motorcycles.

This professional manual includes complete maintenance, troubleshooting, repair, and overhaul procedures directly from KTM engineers, ensuring your bike performs at factory standards.

Whether you own a KTM LC4 400, LC4 620, LC4 640 Adventure, or LC4 660 Rally, this manual covers every model from 1998 through 2003 with detailed step-by-step instructions, diagrams, and technical specifications.

⚙️ Contents

🔧 General Information
🧰 Routine Maintenance & Tune-Ups
💥 Engine Disassembly, Inspection & Assembly
🚦 Fuel & Exhaust System
⚡ Electrical System & Wiring Diagrams
🛞 Suspension, Wheels & Brakes
⚙️ Transmission, Clutch & Gearbox
🧩 Frame & Controls
📐 Technical Specifications & Torque Settings

💡 Why You Need This Manual

✅ OEM factory content — same manual used by KTM technicians
✅ Covers KTM LC4 400 / 620 / 640 / 660 models (1998–2003)
✅ Step-by-step repair procedures with clear illustrations
✅ Perfect for DIY riders, workshops, and restorers
✅ Save time and money on maintenance & repairs
✅ Printable & fully searchable PDF format

🏍️ Models Covered

• KTM LC4 400

• KTM LC4 620

• KTM LC4 640 Enduro / Adventure / Supermoto

• KTM LC4 660 Rally / SMC

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