Hello Dax friends ! I have actually lost nothing in your forum, but I hope that someone can help us anyway. I bought my son a quad in which the China replica of a Dax engine with 125cc (I know that one should not expect a great quality here). The engine ran first 2 days without problems. After that he went out more and more often as soon as the first gear was inserted. Now after 1 week the engine does not start at all. test: petrol runs from the tank to the carburetor. Air filter is clean. Ignition spark visible. Test-by-probe stand gas screw completely pure and again 2 revolutions out. Air quantity screw completely pure and 1.5 revolutions out. Carburetor opened and nozzles carefully blown through with compressed air. 1xStartpilot. Between the tests I allowed the engine to dry by means of warm air each time, because petrol was recognizable by the candle. has enough experience to conclude from the crime story on the killer. In the appendix are some photos. First thank you, especially on behalf of my son. Greeting – Alex