I would love to hit a solid and reliable 45MPH. But 40MPH is good enough to get around on in traffic.
I've used a belt sander to cut the head down on two stock bikes. Made a really noticeable difference in power on a bike that already had a pipe and carb on. That'll happen on this bike if I keep with a stock cylinder. I plan on flipping 2nd gear when I rip into it for the shift puck replacement.