BMW R 90 S Workshop Manuals
If you wish to carry out maintenance for your BMW R 90 S then it is usually a good idea to have access to a Workshop Manual to keep just for reference in the event that you want to know easy methods to strip off a particular component like the Exhaust and fit it again accurately.
Searching for BMW R 90 S Manuals.....

BMW R 90 S Workshop Manuals will provide you with specific diagnostic information with regards to your two-wheeler so if something is broken it will help you ascertain what the issue is and ways to resolve it. Then you are able to decide if you can do this on your own or in case the job is just too big you can still make a booking for your R 90 S into a suitable motorcycle garage.