If you have to carry out adjustments to your Aprilia ETX 350 then it will always be a good idea to possess a Workshop Manual for reference should you want to know ways to strip off a particular component much like the Wheel Bearing and install it again accordingly.
Aprilia ETX 350 Workshop Manuals will give detailed diagnostic information on your car or truck so if something is faulty it helps you identify what the problem is and the best way to repair it. You will be able to evaluate if you can do this by yourself or in case the job is simply too big you could book your ETX 350 in with a local garage.
Aprilia ETX 350 manual