That's probably why it was flooding so bad at first.
Call T.T. Service center, and tell them about the needle
and they will probably send you a new one. Maybe even
a new carb.

I was gonna mention how touchy the adjustment on the
needle would be, like it is....but you already found out.
That wouldn't be the first time an engine came out of the
factory with the wrong needle in it.

Enjoy....Dave.