If you wish to carry out repairs to your Derbi Supermotard DRD then it is always a good plan to have access to a Workshop Manual for personal reference if you want to know the right way to remove a certain part for instance the Brake Discs and fit it again effectively.
Derbi Supermotard DRD Workshop Manuals offer you certain diagnostic info for your car so if something is wrong it helps you understand what the situation is and the way to make it better. You can then evaluate if this can be achieved yourself or if ever the job is just too big you can still book your Supermotard DRD into a decent garage.
Derbi Supermotard DRD manual