Carburettor problems 250 EL

Hello, I’ve been fighting for 4 weeks with the 250 tbsp of a friend who’s been standing in a corner for the last 3 years because she hasn’t been running. I’ve already reported on it in a different thread, and I’ve been able to solve some problems there. Unfortunately, I’m not getting any further at the moment, and I’m trying my luck now in a new thread that specifically describes the current problems……Previously following info; I’ve got the two carburetor(s) in the last 4 weeks All nozzles and cables are free, all trains are OK. The idle needles stand on factory setting 1 3/4 revolutions. Problem 1: If she has stood one night, she does not start. With Choke she generally does not start. Without Choke you notice that she wants to start, but does not get enough fuel. If you increase the idle with the idle screw, it runs on, but then turns very high in idle, so that you have the idle with the screw problem 2: If you pull the clutch during the ride and let it roll, it goes out after 100-150m. In the stand, however, it runs for hours. If you let it roll downhill without pulling the clutch, it doesn’t go out. I’m curious about your ideas….. Greeting Dirk