ZX9R BJ 1996 Start-up problems

Hello, I’m new here at the Kawaforum and I want to introduce myself briefly. I’m 62 years old and have been riding motorbikes since my 20th year of life. So far I had 16 different machines, mostly sports bikes, various manufacturers. Among them was a ZX9R BJ 1995 about 23 years ago, with which I was super satisfied at that time. Therefore I bought a ZX9R this year as a souvenir of “old” times, and that is a BJ 1996 in green/white. Is in an excellent condition with only 12000 km. There were no start problems during the purchase, and also not about 4 weeks ago at the TÜV. She wanted to start again a few days ago, but unfortunately she did not give any more mucks of herself. Thought of course immediately, battery is over. New bought and installed today, but unfortunately nothing again. I then dismantled the right handle unit, and see there, pressed on the button and jumped without any problems. Everything assembled again, started again for safety at least 10x, without problems. W Then it was time to take a short ride, but unfortunately only about 200 mtr came, and the engine went off and I can’t start it any more. So I ordered a new starter relay today, hoping to fix the problem. Incidentally, the starter can’t be, since the Kawa has already started today. If the relay doesn’t work, then I’m at the end of my Latin right now, because I’m not a motorcycle mechanic. Maybe someone has an idea, what the may be. Greetings Sigi