I've been messing with the carb on my '04 XL883 over the past few months trying to eliminate those dreaded carb farts. I want to return to a semi stock setup again as a base line and re-tune. What is the proper amount of turns for the carb idle speed setting? I'm talking about the screw that controls the butterfly stop. I know on Holly carbs there was a suggested amount of clearance for the butterfly to cover a transfer slot. What might that be on a Harley CV carb? I know that the idle mixture screw is best set at 2 to 2-1/2 turns then fine tuned.