Help – EVO Softail goes out immediately after the start!

Hello, have a problem with my EVO Softail. When I started it yesterday for the first time for this year it ran initially on only one cylinder (at the front). I had to keep the engine alive with a little more gas in the stand. At a higher speed the engine then ran normally. I then drove about 100 kilometers and it ran apart from a few false ignitions while taking gas away perfectly. Today after the start again the same symptoms. Then I screwed out the spark plugs to the sparks. I started and it ran again only on the front cylinder. When I pulled the candle plug off of this cylinder, it went out immediately. “Now the engine starts to jump only briefly after the start and goes out with a bang and a smoke cloud from the front exhaust immediately again”. Did one of these already have or can someone help me there “BITTE”? THANK YOU in advance, greeting fxstshd PS: The symptom with the short cylinder failure h But in the previous year she also ate at the first start after the winter break, then she ran the whole season free of ice.