Evening, folks, I'm enjoying all the replies, just don't get on very often sometimes. Neither of the bikes has a vacuum petcock, only one of those I've had is on my 500 Suzuki Titan. Accurate info on the "O" rings and vacuum leaks, had those problems before, thankfully learned that lesson already. As I mentioned in an earlier post, thank goodness for the single carb on the Enfield, as well as the Harley and old 250 trail bike. Never any trouble, but this is what you get with technology- -even if it is 70's tech. My Honda buddies hate it when the old paint shakers start and the multi's won't. Of course, I do too, but they have quit teasing me about my HD and that "funny old looking bike" as they call the Enfield. Oh, well, I love 'em all, so I'll get 'em fixed. Thanks again, supposed to be in the mid 50's here tomorrow, so let's ride a bit !! John