If you wish to perform maintenance to your BMW R 100 RS then it is always a good plan to own a Workshop Manual for reference in case you need to know simple methods to take out a particular part for example, the Exhaust and install it again the right way.
BMW R 100 RS Workshop Manuals provides targeted diagnostic info with regards to your car or truck so if something is broken it will help you understand what the issue is and how to resolve it. You will be able to determine if you can do this by yourself or in case the job is too big you are able to make a booking for your R 100 RS into a nearby friendly mechanic.
BMW R 100 RS manual