just opened the box for this thing, it has a threaded nipple in a package with the carb, not sure where that goes? also, no reciept, and no note as to what jets are in it after I sent them the specs on the bike to jet accordingly. Just thinking for the kind of money you spend on this stuff you would get instructions and a reciept. I can not find after searching, what the nipple is for, and which hose goes where? mostly I need to know which one is the vacuum reference for the petcock.