Testing electric choke on my Baotian 4 stroke GY6 and adjusting air fuel screw and starting it

The scooter is running bad when cold, does not respond on throttle until it get warm. When it's warm it works as it should.
I decide to remove the electric choke from a PD18J carburetor and see if it works.
Also tries to adjust the air/fuel screw and see if it makes any difference between 1.5 and 2 turns out.
I hook the electric choke to a 12V battery.