This repair manual covers Yamaha YZ400F 1998-1999, YZ426F 2000-2002, WR400F 1998-2000, and WR426F 2001-2002 motocross and off-road bikes. Table of Contents Tune-up and routine maintenance / Engine, clutch and transmission / Fuel and exhaust / Ignition system / Steering and suspension / Wheels, brakes and tires / Frame and body / Electrical system / Wiring Diagrams. Clymer motorcycle repair manuals can save you money on maintenance and repair bills. Step-by-step procedures and detailed illustrations guide you through every job, from maintenance and troubleshooting, all the way to complete teardown and rebuild. From the Publisher: This detailed, comprehensive manual covers the Yamaha YZF400F, YZ426F, WR400F, and WR426F. The expert text gives complete information on maintenance, tune-up, repair and overhaul. Hundreds of photos and drawings guide you through every step. The book includes all you will need to know to keep your Yamaha running right. Throughout this book where differences occur among the models, they are clearly identified. A shop manual is a reference. You want to be able to find information fast. As in all Clymer books, this one is designed with you in mind. All chapters are thumb tabbed. Important items are extensively indexed. All procedures, tables, photos, etc., in this manual are for the reader who may be working on the bike for the first time. All the most frequently used specifications and capacities are summarized in the Quick Reference Data pages at the front of the book. Keep the book handy in your tool box. It will help you better understand how your bike runs, lower repair costs and generally improve your satisfaction with the motorcycle.

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