If you need to conduct fixes on your Aprilia Sonic 50 GP then it is usually a great idea to have access to a Workshop Manual to use as a reference just in case you want to know methods to take off a certain component like the Clutch and fit it again effectively.
Aprilia Sonic 50 GP Workshop Manuals can offer you specified diagnostic facts for your vehicle therefore if something is broken it helps you identify what the issue is and the best way to make it better. Then you are able to determine if you can do this by yourself or that the job is simply too big you could make a booking for your Sonic 50 GP right into a trusted friendly mechanic.
Aprilia Sonic 50 GP manual