4 turns out from closed or 4 turns in?
Not saying this is the case with you but a lot of guys tune the engine good or atleast it runs without flaming. It runs good and makes decent power, gets ok runtime. In the end life is cut short and the motor is not at it;s full potential because it's tuned with a "rich" bottom needle and a "lean" top needle, not the way this engine was designed to run.
So, it's easy to just look at the idle screw...if it's ran a pretty good ways in you know they got a rich bottom. If it's out pretty close to the outside(approx 2mm from flush), then you know the bottom was set correct. Or close.
I see all the time guys who say they are awesome and running 240. I know the engine is flip flopped with the needles. I have never seen a properly tuned one run over 200-205, with most cases being about 190 ish.
It's not a hard to tune engine, it's not finicky, once tuned I very rarely ever turn needles. Not all motors tune the same. So I think some guys get used to a vspec and then try there best to make this engine sound and tune like that.
Again, this may not be the case with you, just an observation on my part in the past
