If you wish to execute auto repairs for your Aprilia Sonic 50 GP then it will always be a great idea to have access to a Workshop Manual to use as personal reference in the event you need to know how to take off a specific part much like the Drive Shaft and fit it again correctly.
Aprilia Sonic 50 GP Workshop Manuals are able to offer targeted diagnostic guidelines on your car or truck therefore if something is faulty it can help you identify what the problem is and ways to fix it. Then you are able to determine if this can be done yourself or if the job is just too big you can still book your Sonic 50 GP into a nearby car garage.
Aprilia Sonic 50 GP manual