If you wish to perform repairs on your Beta Ark 50 RR then it will always be a good plan to have a Workshop Manual to keep just for a guide should you need to know methods to take off a particular component including Brake Discs and install it again successfully.
Beta Ark 50 RR Workshop Manuals can offer you distinct diagnostic guides for the automobile so if something is wrong it will help you work out what the problem is and ways to repair it. After that you can assess if this can be done on your own or in the event the job is too big you could book your Ark 50 RR in to a local mechanic.
Beta Ark 50 RR manual