I'm wondering if it is much different than normal.
When I first start, (full choke) I usually play w/ the throttle a little, kinda like the real bikers do,
then after a few sec, I drop to 1 notch choke while still playing w/ the throttle a bit. After another 30 secs or so, and if I'm lucky, it will idle at 1 notch choke. After another couple minutes it will probably idle w/ no choke,........but I'm usually at the first stop sign by then.
But no way would I adjust the throttle stop screw when not fully warmed up,.....it not there for that purpose.
Anymore, I usually get ready to roar off before ever starting the bike. As soon as I get down to 1 notch choke, I got it on the hind wheel !