If you wish to conduct auto repairs on your Yamaha Black Max then it is always recommended to have a Workshop Manual for a reference if perhaps you want to know tips on how to take off a particular component such as the Gearbox and install it again safely.
Yamaha Black Max Workshop Manuals offers clear precise diagnostic guides on your vehicle so if something is broken it helps you discover what the issue is and how you can resolve it. You will be able to analyse if you can do this by yourself or if the job is just too big you can make a reservation for your Black Max in to a trusted garage.
Yamaha Black Max manual