If you have a good rider(clutch hand) and he weighs under 250(maybe a bit more) suited up; then you can get there with a swingarm/extensions, chain, sprockets, clutch mod, tripletree/spacers, front strap, rear links, air filter, race exhaust, tune, tire, cut seat(not required but helps), air shifter, and time.
A really good example of this was Sean from Califonia. He weighed 230 suited and ran consistent 8.8s and the occasional 8.9
He use to go by SG1320 on some forums and sean06 on here.