Good day in the round, after renewing the seals between the carburettor and the membrane block, as well as between the membrane block and the engine, I got a new battery. I built it in, and started. After a bit of persuasion the engine started running (was already a little longer). I was running idle, not too high, not too low. So I drove off. Although I turned the gas handle, I only came a little rough at just over 30km/h. In the past the scooter would be supple when I was in position. so back, seat down, removed the bowden train from the engine, it could be moved with a pusher and needle. Checked needle on curvatures, there was nothing to see (from which also). Then I put everything back in place (slider with the cut-in opening towards the membrane block), and started. Engine started, but now with an extremely high speed. A control with the gas handle was no longer possible. I adjusted the Bowdenzugschaubung At the gas handle, no effect, I turned the air and mixture screws in and out one after the other, no effect. Then I had the suspicion that I had inserted the slider twisted, because that could also work, but also this did not bring anything. And that is missing the battery, because I let it go during the experiments, probably did not have any influence. I personally see now only two possibilities: Either the slider is in the built-in state in the carburettor, or the Cold starter remains open. But if the influence at the temperatures has at all I doubt something. Moreover, this contradicts the first driving attempts. What should I pay attention to?? What I did you can read above. Today I went to work again. This time I installed the slider with the cut / sloping side in the direction of air filter. The engine started (something helped with starter spray), jumped on, squirted first properly and dr. The smoke went away, the Leelauf is now so stable that the rear wheel runs a little bit along, as well as can be stopped with one finger. BUT, I now turn at the gas grip nothing happens for about five to seven seconds. After that the engine blows up again. If I let go of the gas grip, it falls back to idle speed again. I did not drive yet, but earlier it turned smoothly according to the gas grip position. What do you do???