If you have to conduct auto repairs to your BMW R65 then it is always a great idea to have a Workshop Manual to keep just for personal reference in case you want to know easy methods to take out a particular part much like the Exhaust and fit it again safely.
BMW R65 Workshop Manuals offers clear exact diagnostic guidelines on your automobile therefore if something is broken it will help you work out what the problem is and easy methods to correct it. You will be able to determine if this can be achieved by yourself or in case the job is too big you can still book your R65 in to a local mechanic.
BMW R65 manual