If you choose to execute repairs on your own Vespa LX 50cc 4T then it is usually recommended to have access to a Workshop Manual to keep just for a guide in case you want to know tips to strip off a particular component for example the Gearbox and fit it again adequately.
Vespa LX 50cc 4T Workshop Manuals will give unique diagnostic guidelines with regards to your car therefore if something is playing up it will help you understand what the problem is and methods to make it better. You will be able to assess if this can be achieved yourself or if ever the job is simply too big you are able to make a reservation for your LX 50cc 4T in with a nearby mechanic.
Vespa LX 50cc 4T manual