If you need to perform repairs for your Piaggio Liberty 50 4T then it will always be a good idea to have a Workshop Manual for a reference if perhaps you want to know proven methods to remove a certain part including Brake Discs and match it again accordingly.
Piaggio Liberty 50 4T Workshop Manuals offers clear special diagnostic information on your car so if something is not working it will help you ascertain what the situation is and methods to fix it. You will be able to evaluate if you can do this on your own or in case the job is simply too big you could make a booking for your Liberty 50 4T in to a suitable car garage.
Piaggio Liberty 50 4T manual