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Actually, there are two hoses coming from bottom of the carb.. The one towards the back of the bike is leaking gas. The one closest to the screw (towards frnt of bike) is not. Are they both drain or vent hoses?
I followed instructions above and never can get flow to change. When screw is loose or tight, gas drips from same hose at same rate. This is only screw I see. I think the other screw I see has a spring on it so I assume it is for idle adjustment. I never can get a good flow of gas thru either hose.
from what you are telling me you are looking at removing the carb and cleaning it!