So it seems I had mixed up the bearings and their races my first go at it, so I removed both races and tried installing them (again) according to the ninja250.org wiki faq page on it (
https://faq.ninja250.org/wiki/Steeri...ng_replacement) but now Im running into the issue that I cant get the 3504 bearing race into the top at all and the 3503 is loose enough to fall out from gravity, this cant be right can it?