If you wish to conduct fixes to your Suzuki Boulevard C90 Black then it will always be a great idea to possess a Workshop Manual to keep just for a reference in the event you want to know tips to take out a certain component for example Gearbox and install it again accurately.
Suzuki Boulevard C90 Black Workshop Manuals can offer you specific diagnostic guidelines for your vehicle therefore if something is playing up it can help you understand what the situation is and how to correct it. After that you can evaluate if you can do this yourself or that the job is too big you could book your Boulevard C90 Black in with a trusted mechanic.
Suzuki Boulevard C90 Black manual