Bike is a 78 Bonneville, with electronic ignition. Bike runs great, starts first kick almost everytime, give it a couple of minutes to warm up with the choke on and she idles good. Here's where it gets weird. If I go for a ride, no matter how long or short, and I stop somewhere and turn the bike off, whenever I go to start it back up, it fires right up, but won't idle worth a shit. It will stall out without throttle. I'm totally confused by this, because it runs great and idles fine up until then?? Any ideas?