buy a good full exhaust, put in a power commander, small box mod, bmc race filter, nos dry kit, 16 tooth front sprocket, and a good tune and it will be fast.
then,
sell it all, except the power commander, and take a huuuge loss, then take those few pennies you got from that and go turbo.
that was my situation.
be sure what you are going to do with the bike.
(i was told the same thing back in 02, i could have saved a bunch of money)
just a thought.