Im pretty sure i got er nailed down, had to put 50 pilot in it and it cleaned righ up, and needle is dropped alway down, main jwt it came with seems a tad on rich side but soes work real good so im fonna leave er alone my next batch of oil i mix will be 32 to 1 per gallon i have the first mix set up at 20 to 1 and its to much with caster 927 lol