I just came back from Bermuda, and they have an amazing amount of tricked out scooters, race replicas, choppers etc. They have a 100cc max for 2 stroke, and 150cc max for 4 stroke. It's hard to believe but they have a lot of "customized" rides, and judging by the performance of some of these bikes, a pretty good idea on how to squeeze all the performance they can from these tiny motors.