Ok i started her up but she was running very slow 20-25 (she was faster before). The choke did pop up. Then she started shutting off by herself. I started her a first times and drove 20-40 feet and broke down again! Then she would'nt start at all. Then when peddling back home i rode her down a very steep and and she started up for a few seconds and died!
Now I have no idea what could be wrong.