Kymco Yager runs gasoline into the air filter

Hello, maybe someone still has a flammable idea here. It is about a Kymco Yager 50, 2Tacter. Built in 2003 and only 12000Km. Until the parking he always ran. After 3 years of service he should be made fit again. Of course only sprung up briefly with the addition of Starhilfespray. I cleaned the carburettor and again in, air filter the same. New battery and starter made the same. Then he jumped on briefly and then nothing more….just under r direct addition of gasoline to the combustion chamber. Air filter housing again from time to time with the hand on the carburetor air intake nozzle a bit held and it went on and it stayed too. However, only as long as I controlled the air intake by hand. Air filter housing again up and nothing. Only when the intake hose a little stops it runs. Have now made a flap for air reduction and so it goes well also in the stand gas and gas can be given. But…. after a while tro pf petrol from the air filter housing. Maybe someone knows advice… Greeting Ralf