Yes thats true. Well, I have the problem with the carb when the engine is hot. It starts right way, mostly without even pumping and idles very steady. Once the engine is hot, its bogging (I think thats the right word in english) when I reapply the throttle after coasting or when I accelerate from standing. If I press the throttle very slowly its not that bad, but when I normally ue the throttle, its bogging for a moment until it accelerates normally. Sometimes it almost turn off the engine. Also, when I am cruising on the same level with the throttle, it feels like its hesitating up and down slightly and as if someone is pulling me back. Full throttle everything is fine though. The carb is completely clean, I also installed a new fuel filter. Any suggestions would be welcome.