If you need to perform maintenance tasks on your own Aprilia NA 850 Mana then it is usually a good idea to have a Workshop Manual to keep just for a guide if you want to know simple methods to remove a certain component for example Wheel Bearing and fit it again properly.
Aprilia NA 850 Mana Workshop Manuals are able to offer distinct diagnostic details for your automobile so if something is faulty it can help you figure out what the problem is and easy methods to correct it. After that you can analyse if this can be done by yourself or in case the job is just too big you can actually book your NA 850 Mana in to a nearby friendly mechanic.
Aprilia NA 850 Mana manual