Thank you @PawPaw.It add extra air to the intake charge to make it leaner. Most of the carb 4 strokes end up having extra fuel in the system when they die suddenly and thus the hot start was added just for this.
FYI: Three turns out on the fuel screw indicates you are jetted lean in the pilot circuit of the carb.
I was thinking the same. The bike runs nice when choked. I had intended to buy a larger PJ, and did buy two of them, but apparently I bought the wrong ones.
I'll pull the float bowl and take another look, and make another order. RMATV should love me by now.