If you wish to carry out fixes on your own Aprilia Scarabeo 100 4S then it is always a good idea to have access to a Workshop Manual to keep just for a reference if perhaps you want to know ways to take out a certain part much like the Gearbox and match it again perfectly.
Aprilia Scarabeo 100 4S Workshop Manuals will give certain diagnostic facts on your car so if something is broken it can help you find out what the issue is and how you can fix it. You can then decide if this can be achieved by yourself or if the job is too big you could book your Scarabeo 100 4S into a nearby friendly mechanic.
Aprilia Scarabeo 100 4S manual