If you want to execute maintenance on your own Honda XR 100 R then it will always be a good plan to possess a Workshop Manual for reference in case you want to know the best way to take off a certain part for example the Drive Shaft and install it again accurately.
Honda XR 100 R Workshop Manuals will give you specified diagnostic guides for your car therefore if something is playing up it will help you figure out what the problem is and the best way to resolve it. After that you can analyse if you can do this by yourself or in case the job is too big it is possible to make a booking for your XR 100 R into a suitable car garage.
Honda XR 100 R manual