Hello everyone, this is my first post and I hope for your help. Was always quiet reader, from today this should change. Therefore to my first problem, in which he can certainly help me. It is about a Derbi scooter, GP1 125ccm, year 2011, 4stroker, which has only 4500 km down. Note that the vehicle had been standing for a very long time (2014) and I first had to change all liquids. In addition, the carburettor was cleaned several times until the Ki In the meantime I also got a TÜV, the exhaust gas examination went well. The spark plug image is deer brown, actually as you would like it to be. Now, however, my problem comes: when I start the engine in cold condition, my scooter also runs perfectly. It turns cleanly up to 100 KMH. After a certain warm running phase, however, I have the problem that I have to fight very hard especially when driving at the traffic light. As soon as he gets hit, he runs again perfectly. I.e. I can get him out full again without any further problems. Now, of course, it doesn’t make sense that I have to worry every time at the traffic light that the scooter doesn’t die from me. Does any of you have any idea what this could be about? I also have to note that I accidentally turned on the mixing screw when cleaning the carburettor. I have it in my hands. I tried to adjust it in a warm running state. However, since the scooter was running clean, I was satisfied with the setting. I removed the choke once and hung it to the battery. It worked and changed the needle accordingly. Therefore, I rather exclude a defective choke. The scooter was not tuned, it is in the Origina. As I said, the approach problem is not in the cold state. There I can start well and do a great job of speeding up, there are no false ignitions. After a certain runtime there are only problems when starting up, everything runs out. For your help already big thanks. Andy