If you have to undertake adjustments on your own Genuine Scooter Stella then it is usually a good plan to have a Workshop Manual to use as reference just in case you need to know techniques to remove a particular component for example, the Brake Discs and match it again safely.
Genuine Scooter Stella Workshop Manuals will give you specific diagnostic guides for your automobile so if something is not working it will help you identify what the problem is and the best way to resolve it. You can then determine if this can be achieved on your own or that the job is just too big you could make a booking for your Stella in to a trusted car garage.
Genuine Scooter Stella manual