My CL-350 seems to be running on only one cylinder (one pipe never heats up). I rebuilt the carbs and don't think fuel is the problem. While running, if you take the plug wire off of the spark plug but hold it close, the spark will jump from wire to plug and that cylinder will start to run (with increased rpm). Push the wire on the plug, stops firing, pull the wire just off the plug, it will fire. I am not getting this, maybe some kind of coil issue?