I have an 01 Vulcan 500 I got used and it sometimes doesn't fire on the right cylinder. I cleaned the carb and then I could smell unburned gas in the exhaust so I know it is getting gas. Replaced the spark plugs and that did not help so I replaced the coil, and it still sometimes runs on the right cylinder and sometimes it doesn't. I am at a loss as to what to do next. I can easily tell when it is not firing because the RH exhaust doesn't heat up like the LH and I can smell unburned. It might be easier to diagnose if it was consistent, but it hit and miss.