If you need to undertake maintenance tasks on your own Aprilia ETX 635 then it is usually a good idea to own a Workshop Manual to use as reference if perhaps you want to know easy methods to strip off a certain component such as the Wheel Bearing and fit it again successfully.
Aprilia ETX 635 Workshop Manuals offers you unique diagnostic wisdom for the vehicle so if something is broken it helps you identify what the problem is and tips to make it better. You can then evaluate if this can be done on your own or if the job is just too big you can still book your ETX 635 into a decent repair garage.
Aprilia ETX 635 manual