This is me attempting to replace the inner camshaft bearing on a YZF-R125 cylinder head.

I’ve not done this process before and it involves extracting a bearing from a blind hole. I’ve found how it’s meant to be done but this is a test to see how well that goes to see how difficult it is, and to help me decide whether it’s something I want to try doing on my main engine.

The bearing puller I’m using is pretty much the default ebay one, just search on “blind bearing puller”.