If you choose to carry out adjustments to your BMW F800 S then it is usually a great idea to possess a Workshop Manual to use as reference in case that you need to know the best way to strip off a specific component such as the Exhaust and install it again in the correct way.
BMW F800 S Workshop Manuals offers clear certain diagnostic information with regards to your car so if something is wrong it will help you find out what the problem is and easy methods to correct it. You can then assess if this can be done by yourself or if ever the job is simply too big you could book your F800 S in to a suitable car garage.
BMW F800 S manual