In reviewing the stock carburetor on my 1984 Suzuki FA50, I have a general question regarding the port as shown with the red arrow in the sample pics attached (not my actual scooter). This port appears to be just a vent port as the stock carburetor had a black hose connected here which went directly up in to the area under the seat and was connected to nothing else. What is the purpose of this port and does this even need a hose connected to it?
In addition, I also have been fighting with gas leakage through the small hose on the bottom of the carb which appears to serve the dual purpose of draining the bowl for storage when loosening the drain screw -and/or- automatically draining the bowl through the overflow pipe located inside the carb if the bowl gets too full - correct? It leaks small amounts while driving and after stopping while the petcock is either in the ON or REServe setting and with the drain screw closed. Is this only possible if the needle valve is not fully seated or the floats need adjusting? Anybody else have this issue and how can I get it to stop?