If you have to undertake repairs on your Vespa LXV 50 then it will always be recommended to have access to a Workshop Manual to keep just for a guide should you need to know tips on how to remove a certain component for instance the Clutch and match it again the right way.
Vespa LXV 50 Workshop Manuals can provide special diagnostic info on your car or truck so if something is not working it helps you discover what the problem is and how to repair it. You will be able to evaluate if this can be done by yourself or in case the job is just too big you can actually book your LXV 50 in to a local car garage.
Vespa LXV 50 manual