If you choose to perform maintenance on your own Suzuki Boulevard 400 then it will always be a great idea to own a Workshop Manual for a guide in the event that you want to know ways to strip off a certain part for instance the Wheel and match it again in the correct manner.
Suzuki Boulevard 400 Workshop Manuals will give specified diagnostic guidelines on your car so if something is not working it can help you identify what the situation is and the best way to correct it. Then you are able to analyse if this can be achieved by yourself or that the job is too big you are able to book your Boulevard 400 in to a decent garage.
Suzuki Boulevard 400 manual