If you have to conduct maintenance tasks to your Aprilia Sonic 50 GP then it is always a good idea to own a Workshop Manual to use as a guide in case you want to know the best ways to remove a certain component such as the Clutch and fit it again effectively.
Aprilia Sonic 50 GP Workshop Manuals provides special diagnostic guides with regards to your automobile so if something is wrong it can help you find out what the issue is and the best way to fix it. You can then determine if this can be achieved yourself or in case the job is too big you are able to make a reservation for your Sonic 50 GP in with a suitable mechanic.
Aprilia Sonic 50 GP manual