So it is cold and raining off and on so no riding , I finally tore into a spare set of carbs I bought awhile back from Joe Elif . They were pretty gummed up and very dirty inside and out ... I like challenges I only wanted these a spare anyway. (Always like spares parts ) so got one carb tore down and soaking , when I pulled butterfly shaft out the seals were toast , I suspect at some point someone tried to soak carbs and this will tear up the seals . There is NO short cut breaking the carbs off the rack is only way ,and one other seals that is super critical is the fuel interconnect rail ....do your carbs right the FIRST time if it leaks fuel onto a hot engine well I dont think I need to explain. Anyway not sure about other carbs, when I rebuilt my carbs(on my seca ) seals did not look real bad but replaced anyway .