Problems Yamaha V-MAX 1200 EN JG 89

Hello together! I doubt slowly but surely! I have ne Yamaha V-MAX 1200 EN JG 89. For some time now I have the following problems. Problem: 1. Misignitions 2. Ruckelt/Stuttert 2. Power loss 3. No more current I have: 1. Gasifier cleaned and seals replaced 2. Gasoline filter replaced 3. Charger replaced 4. Spark plug replaced 5. Iridium spark plugs mounted 6. New battery 7. New fuses mounted 8. Ignition coil is controlled and ok! 9. Quetschverbidung soldered et It seems that it’s something electrical! When I was ready to start again after all this everything went perfect at first! My baby ran brutally afterwards and afterwards the problems started again. I think about replacing the complete harness and replacing each single cable with new ones. Have replaced the battery with a new one and the problem still exists. I have misignitions while driving and that especially in the cold condition. As soon as the V-MAX is warm are the misignitions And again she left me in spite of new battery etc. Can you/someone help me?! I despair slowly but surely! Friendly greeting Donni88