Hello I have a little problem with my scooter. After about a week the carburetor and the fuel filter is always empty. I have to fill the system again and again so that it runs. I have already changed all seals and petrol hoses. The petrol tap works at least when you suck at the vacuum hose comes gasoline It is also nowhere what is moist or dripping. Roller is a: Yiying Retro YY50QT 15