how can i fix it?

i have to start my poinner 125cc with the choke on EVERY time, not sure what issue it has? and have to keep a small rev at lights or the bike will simple cut out, meaning starting in mid traffic which is a true pain holding up cars, it wont idle and have adjusted the screw on carb. still not luck all it does it have a higher rev when choke is on. any help would be awesome :)