Easy first. Turn the idle mixture screw (it might be blocked off) a specific amount of turns. If it will idle at 2 turns start there. At 1/4 richer does it get better or worse? Better go another 1/4. Worse? Go lean. Beyond that I have no familiarity with your scooter.
Thank you. There is nothing about this engine that is out of the ordinary, just a lawnmower engine basically. I suppose I was hoping that someone who had the same issue once upon a time could give me a solution that worked for them. I just hope I can somehow iron that burblebog from a stop out finally.