If your looking for a major bump in performance your money is better spent elsewhere.
I don't think you are going to see any major increase in HP just stroking that motor.
I run with a guy (frequently) who owns an '04 Road Glide with a 95" setup that includes SE HTCC heads, Andrews gear drive TW50 cam, and race tuner.
He can out run my 103" SEEG, not by much mind you but, the point is their are people getting loads of HP out of the 95" motors. [smiley=helmet.gif]
Do some homework and I'll bet that for the money you were gonna spend you could squeeze 125 ponies from that 95" motor and that will make for a real fun scooter.
Oh yeah, don't forget to save a few bucks for the stuff your gonna break after squeezing out the extra ponies!!! (clutch, tranny, belts, etc.etc.) LOL[smiley=laugh.gif]