gordonfi
XS400 Enthusiast
You can go as many as 4 before going up a jet size. (pilot) My 82 that is all stock runs perfect at 3 1/2.
I don't know what the actual turn count was the other day, but rode to work, and at noon went to start it. It backfired once, and next I saw the Idle Screw on the motor. I had to loosen the tank so I could screw it in a bit to get it started and go home.
Later, I took the tank off again and at 2 1/2-3 turns adjusted on each side while it was idling for maximum RPM with each adjustment. There seemed to be a sweet spot with each one and that's where I left them. I put some caulking over the holes to prevent ejecting the next time and to hold the adjustments. Caulking is easy to poke out if necessary, but will hold things in place until then. It idles now pretty reliably around 1500 rpm. I'll leave it there until the engine gets worked some more.