If you need to undertake adjustments on your Gilera TT Surfer 50 then it will always be recommended to possess a Workshop Manual to use as reference in case you need to know the best way to take off a particular component for example the Drive Shaft and install it again accordingly.
Gilera TT Surfer 50 Workshop Manuals can provide certain diagnostic details with regards to your car therefore if something is broken it will help you work out what the issue is and methods to repair it. Then you are able to decide if you can do this by yourself or that the job is just too big it is possible to book your TT Surfer 50 in with a suitable mechanic.
Gilera TT Surfer 50 manual