Ok so im probably over confident in my technical abilities but oh well, i've ported car heads and turbochargers back when i was racing cars too and i got insane results so i figure i can port the cylinder on my bike. Im sure everyone on here will say dont do it, etc etc, but im going to anyways, im just curious if raising my exhaust port 2mm is overboard? i know i will feel the change at 1mm but is 2mm too much? i've always been one to push the limits (yes it's smacked me in the face but i see it as a learning experience, like i learned not to do that again) So 2mm too much? Thanks guys.