Idle Screw

[riotstar]

Pulled up at some traffic lights today and the bike died on me. it's a bt50qt-11. wheeled it home and checked it out. Noticed that the idle screw has come loose and vanished. Would this be why it died and why I can't start it? what can I put there in place of an idle screw if this is the case?
Thanks,
Chris

[hypojam]

You should have still been able to start! you just needed to open the throttle up while trying to start it

[riotstar]

nah, still won't start. been going so well the past week too. maybe I flooded it? just tried again, a few hours after it died and still no life.