Back your Low Speed needle out even with the end of the throttle barrel, back the High Speed needle out about 4 turns, now start it up, set the High Speed needle to peak rpm then slow to the lowest idle that it does not quit, start lean ing the Low Speed a bout 1/8th turn at a time, checking the transition after every other change. At some point it will start to idle very smoothly, gradually reduce the throttle setting to about 2,000 to 2,200 rpm. Now richen the peak down by about 200 rpm amd check transition, it should accelerate and run smooth as silk.