Hello! I have been driving Vespa Cosa 200 (1992) for some time and am actually very satisfied with the “part”. Unfortunately, she has a Macke, which is probably a child’s disease of the Cosa 200. If the tank is about half empty, the carburetor no longer gets enough fuel and the Cosa goes out and then doesn’t start any more. But if petrol is filled up into the tank, it can easily be started again and then drives on without any problems. a if the tank is semi-empty, there would not be enough pressure to provide enough fuel in the carburettor; who has similar experience or even advice to remedy it?