If you choose to conduct adjustments for your Derbi Senda Baja 125R then it will always be recommended to have access to a Workshop Manual for a reference in the event that you need to know techniques to take off a certain component for example the Gearbox and fit it again efficiently.
Derbi Senda Baja 125R Workshop Manuals are able to offer special diagnostic facts for the car therefore if something is not working it can help you ascertain what the situation is and ways to correct it. Then you are able to analyse if this can be done yourself or in case the job is too big you can book your Senda Baja 125R in with a decent repair garage.
Derbi Senda Baja 125R manual