Carburetor Question

I have been fighting with this carburetor for a while now and finally got it running. My question is. Why will it run with the flood hose disconnected and not with it connected.



That hose is supposed to go straight down, not up. It needs to be able to vent. Also make sure there are no obstructions in the hose.



That makes sense to me. But both my XR's were hooked identically when I got them. A single  hose ran from one vent to the other. And I never gave it a second thought.


Does the top vent vent into the air box or does it just hang loose as well?

Edited by rocketritch

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