Rex rs450 defective?

Hey everyone,

I'm currently having problems with my Rex and it won't start. I've tried absolutely everything, like changing the carburetor, changing the spark plug, charging/changing the battery, starter fluid and countless other things. Now the following scenario: when I hold down the electric starter and combine it with the gas, only the electric starter sounds and the engine itself remains silent. However, I accidentally found out that if you pour petrol into the intake manifold or where the carburetor sits and try to start the scooter, the engine actually starts but only for a short time until the petrol in the hole runs out. My guess is that the engine isn't getting any petrol for some reason or I've wired something wrong on the carburetor. Can anyone confirm this or show me how to check it or are there other reasons that could be related to this kind of engine behavior? I would be very grateful, I'm really getting desperate with this thing.

Thank God I'm getting a Peugeot Speedfight 2 soon and hopefully I won't have any problems with it.

Thanks in advance