Problem with start with scooter. Jumps only on with start pilot and then drains.

Hello municipality, I have a problem with my Beeline Pista 50cc 2 clock year 2016. He ran a little over 7000 km. History: A work colleague passed on with her scooter, which stood 1.5 years. According to her he ran perfectly until the last use. Now I have the scooter for 2 weeks and he does not want to run rationally. Other posts unfortunately did not help me, therefore I open a new one. My problem: I get the scooter only with start pilot (both E-Sta) As long as I continue to spray, it runs. If I listen to the start pilot in the carburetor, he is soaking up. In addition, he smokes very strongly during it (could it be that he squirts because of the start pilot?). What I have done already: battery is new, spark plug new, fuel new, air filter new, fuel filter new, fuel valve new, carburetor completely disassembled and cleaned, checked for foreign air. In some of the above works I had help from a fr and who knows a lot better about scooters than I do (I’m completely new to the subject of scooters). We also checked whether gas can get into the carburetor at all, yes he does. Do you have any ideas about what that might be?