Hello, my GR650 is only running on one cylinder. I checked the following: 1. Ignition spark is there, so first the candle changed –> no change 2. Candle plug incl. ignition cable and ignition coil changed from left to right –> no change 3. Ignition box replaced by one that works 100% –> no change 4. Wiring of ignition box to coil checked for passage –> everything fits 5. Resistance of impulse coils tested –> everything in the green area Now you might think it’s mu ss lying on the carburettor –> BUT: 6. which has been completely disassembled and thoroughly cleaned (ultrasound bath) Now comes the curious part of the story… If I pull off the candle plug and only touch the candle with the lower rubber sheath of the plug, the second cylinder will enter! I’m finished with my Latin… Does anyone have any idea what could cause it or what I can still test? Tomorrow I will test the rectifier. I heard that if the ignition is broken, I am grateful for every tip! Greetings, Sebastian