I did notice a small bit off in the low range. But, it rolled into a very strong mid, I believe it is much stronger than stock, then hits extremely hard in the top. I was too scared to pin it up top in any gear but 5th and I got a wheel spin. But, I also have a pretty knobby tire. But, it would not spin the tire anytime most of the time with the stocker. So, there is a pretty drematic shift in power. It will wheelie in the mid range, but mostly spin up top. I did let it rev out in 5th and it was still pulling the front tire off the ground. I had it ported for mid-top, but the pipe sure did the total job.
I think I busted the rear shock, as it feels a bit more bouncy today than it did yesterday.