2004 Yamaha BIG BEAR 4WD Service and Repair Manual

The code to check on a 2004 Big Bear 4WD is YFM40FS, and the manual that documents it is LIT-11616-BB-40.

Note how the codes shift through this generation. Because Yamaha wrote one book for 2002 to 2006, the variations are all listed together and you can see at a glance which procedure applies to which year.

Content covers engine removal and full overhaul with inspection against service limits, carburetion and fuel delivery, the clutch and transmission, the final drive and four-wheel-drive hardware, brakes, wheels, steering and suspension, and the electrical system including wiring diagrams. Torque specifications appear alongside the relevant work, and the troubleshooting material starts from the symptom, which is the practical way into most jobs.