If you choose to carry out maintenance tasks for your Harley Davidson XLCH 900 Sportster then it will always be a good idea to own a Workshop Manual for a reference in case that you need to know how you can strip off a particular part for example Brake Pads and fit it again in the correct way.
Harley Davidson XLCH 900 Sportster Workshop Manuals will give you particular diagnostic information with regards to your vehicle therefore if something is not working it will help you identify what the issue is and some ways to resolve it. Then you are able to analyse if this can be done yourself or that the job is just too big you could book your XLCH 900 Sportster in with a suitable car garage.
Harley Davidson XLCH 900 Sportster manual