Use Echo Power Blend, or Stihl Ultra, mixed with 89octane gas, @ 50:1 ratio, these are ashless, smokeless oils...so you wont get smoke at all.
When tuning, get your low end set so it idles smoothly, it doesnt try to race off, and it doesnt load up and flood.
Once the low end is set, take your high needle and blip the throttle from idle to wide open for just a second. If it stumbles, hesitates, at all...turn the idle needle out 1/8 turn, and turn the High needle out 1/4 turn. Now try it again..if it does not hesistate at all, you should not have to touch the LOW needle anymore.
Now, once it is accelerating off idle with no hesitation, take the H needle and turn it out 3/4 turn. Now hold the throttle wide open. it will probably rev up some and start to sputter, run rough. Slowly turn IN the H needle until the exhaust no longer has that rough "4 stroke" sound to it, and it gets that sharp 2 stroke whine. Now back it down 1/8 turn.
Go down to idle...now pull it wide open, it should rapidly come up to a smooth wide open speed, not too fast, but not "4 stroking".
To fine tune it, make a couple cuts, in the middle of the 2nd cut, shut it off, pull the plug out..it should be a medium cocoa color. If the ceramic is white, light ash colored, go 1/8 turn out on the H needle and make 2-3 more cuts, cutting the engine off during the last cut..and reading the plug again.
You are looking for The medium Cocoa color on the ceramic.