richirich, sounds like you have a 66cc actually, and thats what nidyanazo sells too, you really can do more for performance yourself than any dealer, you can do your own porting and mods and come out with a better result, i reccomend the a manic intake, (simply "porting" the stock will do little against the manic) and if you have a dremel you can cut your ports (threads everywhere on this) and a SBP pipe will reallt open up your engine. Also, the RT carb from thatsdax is wonderful, I have it and it really makes this engine fly. I would just do it yourself, or if you really don't want, buy a kit I guess.
Good Luck,
Vista