If you're good with instructions here is all the info you need, with pics too.
(just go to the bore kit instructions).
Technical --Dano's Bike Shop-- 50cc MotoX, Fifty, Fiddy, Minibike Information Source
So I'll ask you this time aspect did you dyno it after doing the mod??
If not you have absolutely no idea whether it really did or didn't do anything at all? There no way you can tell without a dyno I don't care what you say...