How about Mission Impossible, a Triumph speed Triple that changes tyres in mid air, road going to knobblies, I want one.
As for Quadrophenia, I am not sure if anyone else other than Ice Cream Man and I know what that is. I had a Vespa like that in England in the early eighties, very cool.
In T2 the young guy rides an old 4 stroke Honda (XL 125 or the likes) which sounds like a KX250.