If you choose to conduct maintenance for your Vespa S 50 then it is usually a great idea to own a Workshop Manual for a reference if you want to know simple methods to take out a particular component for example Drive Shaft and install it again safely.
Vespa S 50 Workshop Manuals are able to offer specific diagnostic guidelines with regards to your car or truck therefore if something is faulty it will help you figure out what the problem is and how you can fix it. You can then analyse if you can do this by yourself or in the event the job is simply too big you can book your S 50 right into a trusted car garage.
Vespa S 50 manual