Thanks for the imput. have gradually reduced high speed needle from the break-in 2 1/5 open to 1 1/3 for good top end rpm. with 300 rpm drop as you suggest with richening a little. very rough idle that stalls if below 3500 rpm. should I start the low speed needle adfjustment now.? spec. says rpm from 2000-12000. is it realistic to expect a 2000 idle?