2 bar scooter does not start

Hello, so I’ve been trying to get my scooter to run again for a few days. It just went out last week under driving and hasn’t been on since. I suspect that the carburetor doesn’t get petrol but I’m quite new and this is my first scooter. I’ve already built a new petrol tap because the old one didn’t go any more and a new membrane because the old one had many holes and didn’t create any underpressure. Now I’ve been despairing for a few days since i I don’t know any more for help. (The spark plug goes one-way-free)