If you need to accomplish maintenance on your own Aprilia Sonic 50 GP then it will always be a good plan to have access to a Workshop Manual to use as reference in the event you need to know methods to strip off a certain part like the Clutch and install it again adequately.
Aprilia Sonic 50 GP Workshop Manuals will give specified diagnostic wisdom for your automobile therefore if something is not working it helps you determine what the problem is and ways to make it better. After that you can assess if this can be achieved on your own or in case the job is just too big you could make a reservation for your Sonic 50 GP in with a trusted garage.
Aprilia Sonic 50 GP manual