If you choose to perform repairs to your Moto Morini 3 12 Klassik then it is always recommended to have a Workshop Manual to keep just for a reference if you want to know methods to remove a specific part including Brake Discs and match it again in the right way.
Moto Morini 3 12 Klassik Workshop Manuals will give detailed diagnostic information for your car so if something is broken it will help you work out what the issue is and tips to make it better. After that you can determine if this can be achieved on your own or in the event the job is too big you could book your 3 12 Klassik right into a nearby friendly mechanic.
Moto Morini 3 12 Klassik manual