I have an '05 Vulcan 500 (parallel twin). It was stored all summer, so it didn't surprise me much when it wouldn't start. It ran just fine when I parked it.
I cleaned the carbs, and put in new plugs, and it will now idle, but won't rev at all. Twisting the throttle doesn't make it die, but it won't rev either. I made sure the pilot jets and the main jets were clean. The new plugs look OK. The most visible symptom is that one cylinder isn't firing well. It takes 30-40 seconds for the exhaust pipe to get hot (I'm talking about within 8" of the engine). Also, I think I'm hearing an occasional backfire through the carburetor while it's idling (indicates lean condition, right?).
My plan for tomorrow is to pull the carbs again, clean everything again, then swap the pilot and main jets and see if the problem follows the jets. If not, I'll swap coils and see what happens. Anything else I should be looking at?
I cleaned the carbs, and put in new plugs, and it will now idle, but won't rev at all. Twisting the throttle doesn't make it die, but it won't rev either. I made sure the pilot jets and the main jets were clean. The new plugs look OK. The most visible symptom is that one cylinder isn't firing well. It takes 30-40 seconds for the exhaust pipe to get hot (I'm talking about within 8" of the engine). Also, I think I'm hearing an occasional backfire through the carburetor while it's idling (indicates lean condition, right?).
My plan for tomorrow is to pull the carbs again, clean everything again, then swap the pilot and main jets and see if the problem follows the jets. If not, I'll swap coils and see what happens. Anything else I should be looking at?