Moin hope you can help me further is slowly despairing. I used to buy the above mentioned scooter from private. I also knew that it didn’t start it was just the carburetor was probably dirty. I already built the scooter almost completely apart and measured it according to the Atu manual. I discovered and fixed some errors when measuring it. I changed the light engine because no ignition spark came I changed the cylinder because it was very dirty and a seal the engine block was torn. Ignition coil is new because the ignition spark looked weak. Carburettor was cleaned and blown out gasoline filter new and gasoline also comes out of the gasoline hose. Spark plug new gasoline new. Symmerring is densely dry on both sides. Roller does not start with startpilot either. Thank you already for all suggestions Greeting Janek