If you choose to accomplish fixes on your Moto Morini 500 S then it is usually a good plan to own a Workshop Manual for a reference in case you need to know proven methods to remove a certain part for example Clutch and fit it again in the correct way.
Moto Morini 500 S Workshop Manuals provide you with identifiable diagnostic guides with regards to your vehicle therefore if something is faulty it will help you ascertain what the problem is and ways to make it better. You can then assess if you can do this yourself or if the job is too big you can actually make a reservation for your 500 S into a trusted car garage.
Moto Morini 500 S manual