I was not sure what was wrong, but I suspected the rectifier. Didnt want to pay 60 euros so I spent some time searching for rectifiers with same contact. I found this dirt cheap on Amazon and it works perfect. I found even cheaper for about 5 euros but that one was for 50cc mopeds. I bet it would have worked as good.
The photos in the link shows a rectifier without epoxi and that was what I expected. The one I received was filled with epoxi and as water proof as the oem GG ����.
https://www.amazon.se/dp/B07DK6PZ2F?...roduct_details