If you choose to perform auto repairs on your own Derbi Supermotard DRD then it will always be a great idea to have a Workshop Manual to use as reference in the event you want to know the best ways to remove a specific component for instance the Wheel and match it again appropriately.
Derbi Supermotard DRD Workshop Manuals provide you with targeted diagnostic information for the car so if something is broken it helps you understand what the situation is and how you can fix it. You will be able to assess if this can be done yourself or in the event the job is just too big it is possible to make a reservation for your Supermotard DRD into a decent mechanic.
Derbi Supermotard DRD manual