If you don't have a service manual already go buy one, worth its weight in gold. Until then, looks like you're running a little bit rich on cylinder #3. I would also recommend checking float bowl heights when you pull the carbs off again. That spec will be in the service manual. If that doesn't do the trick I would check valve clearances to make sure they are also within spec, that info will also be in a service manual. Just remember that you need to do that when the engine is COLD. Best of luck...
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