Scooter did not ignite whatsoever after lots of attempt. ( +3 degree C) Spark is ok, spark plug is dry. I loosened the two hoses coming from some kind of valve below the tank. By sucking the thinnest one fuel comes out of the other thicker one. By doing this with the thicker connected correctly to the carb, the scooter started quickly. While holding one finger onto the smallest hole on the carb, I can feel a little vacuum. I suppose it it too weak. The metal thing below the tank must be some kind of vacuum valve, maybe with fuel filter too? And there must be some kind of function in the carb that is making the vacuum to the thin hose, that I conclude is too weak. Or am I misunderstanding something? Does anybody know how this works and where the problem can be? The autochoke was replaced last summer. The scooter is a little problematic to start in the summertime too, the longer is was standing still the harder to start. Tree days unused makes 20-30 seconds necessary on the starter.