Vespa GTV Workshop Manuals
If you choose to execute repairs on your own Vespa GTV then it is always recommended to have access to a Workshop Manual to keep just for a reference just in case you want to know the right way to remove a particular part for instance the Brake Discs and install it again effectively.
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Vespa GTV Workshop Manuals will give you distinct diagnostic information for your two-wheeler therefore if something is playing up it can help you find out what the issue is and some ways to repair it. You can then evaluate if you can do this yourself or that the job is just too big you are able to book your GTV in to a decent motorcycle garage.