If you want to execute repairs to your MZ 660 Supermoto S then it is always a good plan to own a Workshop Manual to keep just for a guide in the event that you want to know simple methods to take out a particular component like the Door and install it again correctly.
MZ 660 Supermoto S Workshop Manuals offer you specific diagnostic info with regards to your automobile so if something is playing up it will help you figure out what the situation is and ways to resolve it. After that you can determine if you can do this yourself or in case the job is too big you can actually book your 660 Supermoto S in to a nearby mechanic.
MZ 660 Supermoto S manual