I once had the misfortune of riding a 150cc (I think) Lambretta. My mate had bought it but hadn't passed his test yet so I had to ride it home.
After riding this same mate's Vespa once I didn't actually think that I could find anything more nasty to ride, that is until I rode the Lambretta.
Big wheels....you must have proper big wheels!
And what's all this twist grip gear changing lark? I thought that was reserved for the Raleigh Grifter.