I have marchesini wheels and the sprocket is different then the stock one. i waited two weeks and got the wrong one from a local dealer. very angry at this point! Does anyone know where i could get this sprocket? Also was thinking of going up 2 teeth in rear. I like doing wheelies but also love riding it to it's limits. i don't want to lose top end. a couple people said it is not enough to notice much difference in the bike. what do you guys think?

thanks
joe