I would disconnect one of the wires coming from the kill switch pull it back where it cant touch the frame anywhere and try to start it.
Not sure what the reason for draining all the fuel out was and not sure what you mean by refilling the carb, but as Tom pointed out you should make sure that fuel is flowing from tank to carb and by very slowly unscrewing the small screw on bottom of the carb bowl see if you actually are getting fuel into the carb, you don't have to take the screw all the way out and be sure to close petcock valve from tank first also.
if you choke the engine and do a good bit of pedaling and it does nothing, you should then check the spark plug and see if it is wet with fuel, if it is dry then you likely have a fuel issue with carb jet being plugged up most likely, but if the spark plug is wet with fuel, then most likely you have an ignition problem which could be several things but probably something simple, if you have some W-D 40 and I mean actual W-D 40 it is a water displacer ( W-D ) in the name means "Water Displacement 40th attempt".... just a little education for those who may not know this.
Anyway, spray around the spark plug wire where it goes into the CDI ignition box and you can even remove the magneto cover and spray the W-D 40 all in there, spray it into the kill switch by putting nozzle against edge of kill switch button on twist grip throttle if that is the type you have.
Hope this helps and goes along with the things that have been mentioned so far and remember that W-D 40 is not your friend when something need lubrication, but it can be your best friend when anything electrical like ignition gets wet......!
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