If you have to undertake repairs for your Derbi Senda SM Racer then it is usually recommended to have a Workshop Manual for a guide just in case you need to know methods to strip off a certain component for example, the Brake Pads and fit it again adequately.
Derbi Senda SM Racer Workshop Manuals gives you unique diagnostic details with regards to your car so if something is faulty it will help you work out what the situation is and ways to correct it. After that you can evaluate if this can be done yourself or in the event the job is too big you are able to make a booking for your Senda SM Racer in with a suitable friendly mechanic.
Derbi Senda SM Racer manual