I'm just fucking around, and I do take for granted tuning experience on most people. I allways do big steps to see a result then backtrack to fine tune. His air leak problem isn't helping the matter. I can't stress enouph clean, clean,clean,clean you could eat off anything I put together. And yes if it gets better all the way lean but still gives a rich condition , a longer length or diffrent taper would be my next step . This also depends on a perfect main jet plug chop . Most will leave it because experimenting with diffrent needles gets expensive , but when you find the rite one it's like wow what a diffrence