I've had my Speed Four, for about two months now and finally this past Labor Day weekend got to do some serious twisties...man what a ride. This thing carves the corners with the precision of a surgical knife. I was riding with a V-Max (best friends) who is at about the same skill level of riding as me, but I don't think the V was up to task in the twisty bits. But in the straights, I get my as# handed to me