At my speedfight 4 Lc the oil hose was defective therefore the crankshaft had eaten. I have now installed a new Kw and new bearing. Since I was not sure if the cylinder also got what had been replaced also immediately. All seals of course also. So now the following problem: Roller runs great on and also nice in the stand gas. As soon as I drive it the speed goes after a few meters in basement and it goes out. He gets fuel, and the carburettor h The problem that it runs out after a short drive, however, still exists. What irritates me a little is that the carburettor cannot be adjusted, that is, it does not react to the mixture harvest. No matter if in or out it does not change at the speed. Does someone have a tip on what this could be because slowly no longer know what I could do? Thanks for e your help