If you wish to carry out maintenance tasks for your Suzuki Boulevard M109S then it will always be recommended to have a Workshop Manual to keep just for reference if perhaps you need to know methods to take out a certain part much like the Door and install it again the right way.
Suzuki Boulevard M109S Workshop Manuals gives you precise diagnostic wisdom with regards to your vehicle so if something is broken it can help you identify what the problem is and ways to resolve it. Then you are able to determine if this can be done on your own or in the event the job is simply too big you could book your Boulevard M109S right into a suitable car garage.
Suzuki Boulevard M109S manual