Tilloston 225 T4 - What is this connector?

Hi All, just recently I adquired this 2nd kart with a Tilloston engine 225 T4, and has this connector/hose between two valves in the carb … but the line has a cut to it. I don’t know what it is, and if the cut is making any difference. Could anybody help? Thank you.

It’s a vent for the float chamber. Sometimes fuel will splash out of the vents, the tube stops the fuel spilling everywhere.

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