This book is the official factory service manual. It covers ONLY the engine on the following motorcycle models:
1999-2003 KTM 250-525 SX, MXC, EXC Racing 4-Stroke
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The following subjects are covered: General information, removing and installing the engine, dismantling the engine, engine assembly, electrical, troubleshooting, technical data, maintenance schedule and wiring diagrams. If you need to service your engine - this book is for you.