My maxi luxe is in excellent condition and doesn't NEED anything done to it. I was, however, thinking about getting a biturbo exhaust for it within the next few months. I've never ridden a moped with a biturbo so i was just sort of wondering what to expect? Or if there is something better in the same price range. If my moped does about 35 right now, how much faster will it presumably go with this?