Spun cam bearing...

Then check the cam for runout (axial straightness)..

Or else your revving it too high like RRR posted...

Yes I will check if it’s straight for sure.

It revved like crazy so I guess I went too far.
I will put 6400 rev limiter back in, cam specs say it works between 2800 and 6300 but it really revs so nice, or should I say used to rev ;-)