The pilot circuit (jet and AS) are responsible from 0-1/4 throttle. If the bike feels good below here odds are that the Air screw and pilot jet are good. You might find it wants to be leaned out a touch more just where the burble is. You could try half a clip leaner on the needle but it will also lean from 1/4 through to 3/4 throttle a bit too. I would try that personally if I had a NECW in clip #2. Its very much trial and error.
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