If you choose to execute maintenance for your Derbi Senda SM DRD then it will always be a great idea to have a Workshop Manual to use as reference in the event you need to know methods to take off a particular component for example Gearbox and match it again correctly.
Derbi Senda SM DRD Workshop Manuals offer you identifiable diagnostic facts with regards to your car so if something is playing up it will help you figure out what the problem is and tips on how to repair it. You will be able to assess if this can be done on your own or in the event the job is just too big you could make a reservation for your Senda SM DRD in with a trusted car garage.
Derbi Senda SM DRD manual