If you want to undertake adjustments on your BMW R 100 GS Paris Dakar then it is usually recommended to own a Workshop Manual to use as a reference if you need to know the best way to take off a particular component for example, the Brake Discs and install it again in the right way.
BMW R 100 GS Paris Dakar Workshop Manuals gives you specific diagnostic guides for the vehicle therefore if something is not working it will help you find out what the issue is and how to repair it. You will be able to determine if this can be done by yourself or that the job is just too big you can make a booking for your R 100 GS Paris Dakar in with a trusted garage.
BMW R 100 GS Paris Dakar manual