Return the high speed needle to your original setting (around 2 1/2 turns out). Try slowly revving it up while off the ground and watch the high speed needle. I have found that the oring was a bit worn on one of my Tornado's and every couple full throttle passes the needle would actually close and lean the motor out. I would reset it and it would do it again after 1-2 passes. If this is the case, buy a new oring for the high speed needle at your local hardware store.