If you wish to undertake fixes on your Derbi Supermotard DRD then it is usually recommended to possess a Workshop Manual for reference in case you need to know proven methods to take off a specific part for example, the Brake Discs and fit it again properly.
Derbi Supermotard DRD Workshop Manuals can offer you special diagnostic information with regards to your car so if something is wrong it helps you ascertain what the problem is and tips to correct it. Then you are able to evaluate if you can do this by yourself or in the event the job is just too big it is possible to make a booking for your Supermotard DRD in with a suitable friendly mechanic.
Derbi Supermotard DRD manual