If you wish to undertake maintenance on your own Tomos ATX 50 then it will always be a good plan to own a Workshop Manual to use as a reference if you need to know ways to take off a certain part like the Brake Discs and match it again perfectly.
Tomos ATX 50 Workshop Manuals are able to offer identifiable diagnostic guidelines on your vehicle so if something is faulty it will help you understand what the problem is and tips on how to correct it. Then you are able to analyse if this can be achieved yourself or that the job is simply too big you could make a booking for your ATX 50 in to a nearby friendly mechanic.
Tomos ATX 50 manual