If you have to perform maintenance on your own BMW R1200ST then it is always a great idea to have access to a Workshop Manual to keep just for a reference in case that you want to know proven methods to strip off a particular component much like the Brake Pads and match it again properly.
BMW R1200ST Workshop Manuals offers clear exact diagnostic details for the car or truck therefore if something is broken it will help you find out what the issue is and tips to resolve it. After that you can determine if you can do this by yourself or in the event the job is too big you could make a reservation for your R1200ST into a suitable friendly mechanic.
BMW R1200ST manual