The V's produce more torque, but when you have a 160+ hp I4, couldn't you just gear down to get the pull of a V. Even on 600's. I've rode a '03 6R on the track and it was +3 in the back. That thing had some pull! The top end suffered bigtime, but you don't hit the top speed on the track anyway...usually. The front straight at Miller is like half a mile, literally. And the V's aren't the best at top end either. It sounds to me like gearing down would bring you close to the V's torque. Now I'm talking about regular production bikes. Not bikes that cost over 30-40K. Just a thought.