http://saito-engines.info/throttle_setup.html

Tuning engines isn't my strong suit. I think I need to go back to square one: Low speed screw flush and high speed needle about three turns out. Then 1) start and allow to run for about a minute then 2) go to full throttle and tweak the needle value until I get to maximum rpms then 3) back off 200-300rpms then 4) drop down to the idle position and step by step screw the low speed set screw INWARD to lean the low speed mixture.