I would start with a decent pipe, mod airbox, rejetting (after a leak test of course), then flip those front wheels and spacers in the rear, for extra width.
Then I would extend the swingarm by 4", it looks much better and handles much better too! (Note: this does make it a bit harder to wheelie)
Then, some port work, polish exhaust, and do some intake and transfer port cleanup and shaping.
I raised my exhast post a bit, and enlarged it slightly.
With some work, the blaster engine can make some scary power.
In the end, JUST HAVE FUN!!!