Don't worry about the pegs. Look to San Jose in Calf. for the super snorkle, power filter, and intake. They sell an intake kit for the bike. You really need a matching laser chip unless you add the timing module to the PCIII. You can get cams, valves, pistons, whatever. Speed is just a matter of money. The most of this stuff is for midrange punch. I'm telling you the cheapest bang for the buck is the lower rearend. Steve is right about finding whoreds of info on that website.
I have a carbon fiber snorkle, SJ powerfilter, Full Laser Race exhaust w/ chip, and a K12 regulator, and a 3:1 rearend. I'm building another motor and I will put the PCIII into the mix with it.