Z1OwnersClub GB

So having rebuilt and fitted the cylinder head on my KZ900 A4 I am finding that the valve clearances change every time I rotate the engine and it's driving me mad. Valve guides are new as are a couple of valves. Everything has been cleaned and cleaned again. Everything was well oiled when assembled, everything moved freely including buckets. New camshaft bearings.

So I turn the engine over, measure the clearance between cam and shim, then turn it over again, measure it again and some of them are different! How?

Is this just a case of making sure the lobe is EXACTLY opposite the shim surface as it seems like every time it is a mm or two different the measurement is different to the point of needing a different size shim!

Is this normal???

Fresh cut valves and seats will initially settle even after just rotating the engine a few times so give it a few spins on the starter and re shim any that are on the tight side.
As long as you can get close to a 0.15mm feeler in the gap with the lobe 180 degrees from the bucket don't worry about the clearance you get with the cam in any other positions.
Once run for a few hundred miles just recheck the clearances and re shim any that have settled further.
After that they shouldn't change much between yearly checks.

theoretically the clearance should be the same at all points when the cam's base circle is towards the bucket. But I always measure the clearance with the lobe pointing directly away from the bucket