Quote:
Originally Posted by Lapkritis
With ignition sorted I would move to mixture. Laser thermometer each exhaust port/pipe when the issue is present to narrow down which cylinder is offending. Check the plug, verify with color tune. Could be an air leak/bypass screw out of adjustment. I'd have the vacuum gauge that sits atop the stack on each cylinder also to make sure they're balanced.
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Thanks for the input. I have the same vacuum gauge which is what I used to tune the carbs. They are all balanced. I pulled some plugs and they looked good but they're brand new so it my be too soon to tell. But again, it runs fine other than at idle so I feel as if even if the plugs had a story to tell at idle, it would be erased by the smooth running or cruising around.