It can have a cracked coil (common) or a bad plug wire or cap or the spark plug itself, any of these can cause loss of ignition on 1 cylinder.DAVE0430, you're saying ignition, can you expand that response please
Sticking valves very unlikely. I have heard of a broken valve spring though.I had started the process of syncing the carbs and #3 cylinder was erratic. So I took it a reputable motorcycle shop. It's owned by an individual which is a 30 year automotive engineer whom has always worked on or repaired motorcycles. He seems to think it's the cylinder #3 valves sticking. We weren't able to locate newones. Do you have any suggestions. I have located some heads at a mechanic shop which are complete.