'85 XJ700N, 18,500 miles, totally stock I have had a problem with the bike shutting down at idle until it is fully warmed up, at which point it runs and idles perfectly. Recently, it has been hard to start after sitting for several days. Today it was a little hard to start, with or without enrichment. After riding about 8 miles and having lunch it was a little hard to start and shut down a couple of times. It doesn't stumble, it just shuts down. Got to a gas station and it would not start, although at times it tried to. Went home, got the trailer and came back, and it fired right up but I had to rev it to about 2000 to keep it going until it got warmed up. The battery is fairly new, stays on a maintenance charger, and spins the engine well. The valves are in spec. The plugs look perfect. It is tuned on the lean side with respect to the pilot screws which I set using a colortune plug. What baffles me is that it shuts down just like it does when I turn off the ignition--instantly. I am thinking a fuel issue--maybe need to open the pilot screws slightly. But I am wondering if there is anything in the ignition that might be causing a problem at idle? I'm getting too old for this.