Servus Together! My GT 200 (2 cylinders, 2 clocks no longer starts. It produces no vacuum or too little vacuum in the engine. The candles are dry, ignition and carburettor is fine. The carburettor is now degraded. If I hold a lighter flame behind the suction nozzle the flame will be blown out. However, it should be sucked into the suction nozzle. Now I assume that the crankshaft sealing rings are worn. On the side of Nippon Classics the GT 200 X5 will be shown. Here it is described exactly how it is when one or the other ring is defective. But nothing really applies to my engine. Mind you, both cylinders behave exactly the same. There should be some exceptions. Can someone help me here or does someone know if you can test these sealing rings? Many thanks to greeting Robert