If you need to undertake maintenance tasks on your Hartford HD 125S then it is always a good idea to possess a Workshop Manual to use as personal reference in case you want to know how you can strip off a certain component much like the Brake Discs and install it again efficiently.
Hartford HD 125S Workshop Manuals gives you certain diagnostic details for the automobile so if something is not working it helps you understand what the situation is and how you can resolve it. You will be able to evaluate if this can be done by yourself or that the job is just too big you could make a booking for your HD 125S right into a decent car garage.
Hartford HD 125S manual