I have a 1980 Batavus Starflite 30 mph version moped. Everytime I come to a stop, the dumb thing wants to quit amd sometimes it does. I adjusted the idle speed to a faster speed but it still wants to do it. I am also running it without any type of air filter on the carb. Does that have anything to do with it? I talked to the guy who owned it before me and he said it did the same thing to him. I am also running it in 90 degree weather. One other thing that is wrong is that when I start it, it is harder than ever to start. Sometimes takes me 5 minutes to start. If anyone knows whats wrong please help me.