I have a 91 GSXR750, and recently installed a 90 750 motor. I notice that the far right (when sitting on the bike) carb boot has a hose that comes out of the top of it, about 12 inches long.
Yes, I should have remembered to check this when I pulled the motor, but I did not.
Where is this supposed to go? Is it some kind of overflow? Attach to the petcock?
if the hose is going to the intake boot, it's likely for the vacuum operated petcock. if you have a non-vacuum petcock on the tank, you can just remove the hose and cap off the opening on the intake boot.
Beauty, you come through again. I have a stock petcock with the 3 spigots on it, so I will apply that one to the correct one on the petcock, and I should be in business.