If you have to do fixes on your Kawasaki Vulcan 800 then it is usually a good plan to own a Workshop Manual to keep just for reference in case you need to know methods to take off a specific component including Dashboard and install it again in the right way.
Kawasaki Vulcan 800 Workshop Manuals can provide specific diagnostic guides for your car so if something is playing up it will help you discover what the issue is and ways to repair it. After that you can decide if this can be achieved yourself or that the job is just too big you could make a reservation for your Vulcan 800 into a decent repair garage.
Kawasaki Vulcan 800 manual