Report Excess fuel on one cylinder, it stinks! in Fuel System/Carbs Posted May 10, 2010 Turned out to be carb inbalance. Got a tip from a member saying that the best way to align them is to look down through the progression holes. For reference to others on here, I wound in all idle jets and backed them all out again to about 16 half turns (8 full turns). Runs great now. There wasn't any leaks on the manifold or breakages that I could see/ detect. The tappets are alot quieter now they are running cooler. Must have been excess fuel from one carb to maintain the same idel due to the imbalance.