My brother and I restored my dad’s ‘64 Vespa 150S and the thing is extremely loud!
It is very smelly as well as it’s a two stroke engine, but I don’t mind that at all. Quite the opposite
A friend races Vespas. They are apparently well suited to tuning (perhaps being poorly tuned from factory?), and power is much increased. The noise seems to go up vastly.
He has to re-weld the frame from time to time due to the cracks that form.
Agree, as long as you don't use it around other people it's probably fine.