If you wish to do fixes on your own Harley Davidson FLSTFI Softail Fat Boy then it will always be recommended to have access to a Workshop Manual to keep just for a reference in the event you need to know ways to take off a specific component for example the Brake Discs and match it again correctly.
Harley Davidson FLSTFI Softail Fat Boy Workshop Manuals provide you with particular diagnostic guidelines for the car so if something is playing up it can help you discover what the problem is and the best way to fix it. Then you are able to assess if this can be done by yourself or in case the job is too big you can actually book your FLSTFI Softail Fat Boy in with a local repair garage.
Harley Davidson FLSTFI Softail Fat Boy manual