orwell84 wrote:
There are vehicles and engine configurations that are poor candidates for improving performance. Not so for Vespas. Stock engines seem limited by the need to mass produce them cheaply. Also, to make them reliable even with a fair amount of neglect. Last thing is a docile and predictable power curve. It's a 4 speed standard Ford Escort on 2 wheels.
I'd say a better comparison would be one of the late 80's/early 90's honda civics on two wheels. Massively under-potential motors, which is why you see so many tuners driving them, even if most of them do nothing more than put noisy exhausts on.
Similar story with the VW Golf VR6, but they at least tried to get some value from the engineering, so not nearly as cheap, but you could turn one into a flat-out rally car if you wanted to. I worked with a guy who had one and assuming you could withstand his bumping techno, it was a a blast to ride in.