Some weeks back we chatted about the rough running my EV was doing. I synched the TBs, and everything was sweetness & light. So an area rider suggested 1 1/2 turns out on each air-bleed screw might be a bit excessive, so I turned both in 1/2 turn, to one full turn open. A few days ago I noticed the engine seemed to 'bang' on one cylinder, and was backfiring lustily on deceleration.
This morning I checked the air-bleed screws, and found they were both 1/2 turn from closed. Turning both out an additional 1/2 turn brought much smoother running, and a reduction, though not elimination, of backfiring on decel.
I will accept the possibility I cannot count two half turns of the screwdriver, and only had the screws open 1/2 turn but I thought that screw was only supposed to affect idle. Why is it making a big difference at 3000 and higher RPM?
These are the throttle bodies which have only one mixture adjustment, the screw which hides up inside a shroud on the side of the unit. Any thoughts?