Problems installing Andrews x3 camshafts

Thank you for the translation.)))I wanted to remove, i.e. lower the guides by 3 mm. But now I understand where the dog is buried)))Those people who changed my guide bushings to APE were very responsible......They removed the retaining rings from the Kawasaki bushings and placed them on the APE bushings.To say I'm evil is an understatement....     The photo is not very clearly visible, but a thin screwdriver clings to the stopper.

Thanks for the info, but I think I found a reason..... Described it in a separate post.

Sometimes Z1 heads use a retaining ring on the valve guides, I had one like that on the exhaust side, not sure if it was a repair for a loose guide? Not really sure as I have never seen this on 650/750 heads.

They are held in on the tappet bore bottom face so you need to clearance the spring guide cup by grinding a small window to give clearance to the "ears" or else the spring guide won't sit flush by a few mm.

Here is one I had to fix on that '75 head. Not the best picture but you get the idea.




 

Yeah, I see what you're talking about, thanks. I had to shorten the guides to prevent the valve stem from touching the oil seal. The head is still being worked on, so I can't say yet what the outcome will be...