Replacing the rear sprocket with a bigger one, and raising it back up? WTF? You won't be faster, cuz you won't be able to keep it down. If you want to go faster, stretch it, and then you'll be sacrificing your cornering ability, but I'm sure you expected that when you bought it, right? And yes, taking out the secondary throttle butterfly valves...I believe that was a good thing...

NM, I think this is a bogus thread...