thnx for the replies everyone
so no shim's needed with 25%?
there are a few difference's between the carrot top and the sky top, here are the part #'s
http://www.rcuniverse.com/forum/fb.asp?m=7297001
i'm going to be using the head button from the sky top and i'm looking for a carb that will fit and give me the option to run different size venturi's. LOSI also make's a 9.5mm carb that's fit's this motor but i don't want to run that large of a carb and personally i think with a 7mm or 8mm insert these would be much improved
NO i don't wanna use the 3 needle carb from the dynamite Xp's lol
any tip's on which pipe to use? i currently have an OFNA 063 on there....