some reading for you.
http://www.thunderproducts.com/dial_a_jet.htm
BRed over at totalruckus has installed one of these on his BR.
Maybe it's something that could help you. Looks pretty straight forward to install.
After rejetting (not Dial-a-jet) mine, and swapping out roller weights, resetting idle, mine has a lot more power. I still need to drill out my exhaust and and do a hot engine valve adjustment, to squeek a bit more.