I looked at the pic.
The rubber hose you have pulled up should point down.
If it wont run with it pointing down then the drain screw is probabily loose and the bowl is not filling with fuel.
The screw faces the other side of the engine (Left as you sit on it) it's near the bottom of the fuel bowl.
I dont think you can reach it with the carb installed.
Have you had the carb off and been fiddleing with it or is this a new ped you are trying to get running.
Ps. what position is your fuel valve pointing?
Also there should be a hose running from the brass nipple #5 to the vac. port of the fuel valve.
This cuts off the flow of fuel when the bike is not running.