Good evening, I have a little problem … I have a yiying yy50qt-2 scooter. First registration was in 2008, now he has 36 km down ^^ so a virgin who was just standing around for 7 years…. But it still runs quite well. After charging the battery and a little start-spay he starts up and that in hindsight without starter spray. By e-switch as well as by kickstarter, although only with gas, but that’s ok. Now to my problem. I haven’t driven him right yet, since he still has a little problem … is not registered, only in the garden about 10kmh. If I take the gas completely away now, so just let go of the gas lever and the scooter comes to the stand, it almost always goes out. If I let go of the gas lever slowly controlled, so to the end, it sometimes stays on and sometimes the speed goes far down, then I have to give gas for a short time and then it stays in the stand gas. In between it runs through in the stand gas quite calmly and then it turns on its own again a little high and then it is r down… I’ve already played a little bit on the stand gas, he felt no fluctuations when the stand gas is set higher, only then he vibrates very strongly on the handlebar and felt the speed is then too high. With the carburettor I turned a slot screw, which was marked blue, by half a revolution. After a short test he did not go out, but was only two times attracted to gas and let go, but then had the strong speed fluctuations in the stand. Then it became too late to continue testing. Spark plug is, of course, worn out, which is no wonder. But still looks fine. Oil still looks like new. Pöröse cable I can’t discover… Someone a solution for me? Would I be very happy! To say it, I’m not a complete idiot, but a scooter is new ground for me Ps: is written with the mobile, if there are problems reading, I will revise this on the pc.