If you need to carry out maintenance tasks to your Vespa LXV 125 then it will always be recommended to have access to a Workshop Manual for a guide if you need to know proven methods to take out a certain part like the Exhaust and install it again accurately.
Vespa LXV 125 Workshop Manuals are able to offer targeted diagnostic info with regards to your vehicle so if something is wrong it will help you determine what the problem is and how you can make it better. You can then decide if this can be done yourself or if ever the job is just too big you can actually make a reservation for your LXV 125 in to a suitable repair garage.
Vespa LXV 125 manual