Cause of Excessive Smoke after Adding Gas to Tank?

A red flag popped up when you said you never have to pump the gas when starting . My bet it you have a leaking needle and seat .

OR... you filled up at the 2- stroke pump .
Good point.
A bit off subject, but to your point.
I remember when some idiot fuel delivery guy dispensed gasoline into the below ground "Kerosene" marked tanks at a fuel/mini market.
People didn't know they were pumping gasoline into their kerosene cans, then running their space heaters at home.
Needless to say, quite a few fires and an explosion or two later, the investigators figured it out.
Now its very difficult to do that, especially since the tank fill ground caps are color and shape coded.
Point is, the wrong fuel can get into a cars gas tank too.
Okay, back on with Coolvibes issue...