If you need to conduct adjustments for your Aprilia ETX 125 then it is usually a great idea to have a Workshop Manual to use as personal reference in case you need to know the way to take off a particular component for instance the Wheel Bearing and match it again the right way.
Aprilia ETX 125 Workshop Manuals offers clear detailed diagnostic wisdom for your car or truck so if something is broken it helps you discover what the situation is and ways to correct it. You will be able to analyse if this can be done on your own or in the event the job is simply too big you could make a reservation for your ETX 125 into a decent repair garage.
Aprilia ETX 125 manual