Have A2-Rossel registered abroad?

Hello together, I am just thinking of buying a motorcycle in the EU country and driving back to Germany. Since I currently have “only” the A2, I would have to throttle the motorcycle first. Have you already had experience with it? I think that’s possible at all? In my opinion, it has to be registered in the vehicle license. That shouldn’t be so easy to do abroad, right? Would you like your answer? Many greetings, XxenoxX Addendum: Oh yes, the motorcycle has ready The German documents, so I don’t have to have them rewritten first.