Closing out the range, the 2006 Big Bear 4WD carries the code YFM400FV and is documented in LIT-11616-BB-40.
Yamaha's coverage in this volume begins at 2002 and ends at 2006, so a 2006 owner gets the whole generation in one reference. That helps when tracing a part that may have come off an earlier machine.
The procedures are the factory ones, written for dealer technicians: engine removal, teardown, measurement against service limits and reassembly; carburetion and fuel supply; clutch and transmission; final drive and the four-wheel-drive components; brake, wheel, steering and suspension service; and the complete electrical system with wiring diagrams. Torque specifications sit with their steps, and the troubleshooting chapter gives a methodical path from symptom to cause.
