My first Laverda-aswell - Cylinder Head off !!!!!!

Andy,
I don't see any valve seat protrusion.
If you listen to your local expert he is saying the seats need to drop further in by 1.0mm, means the valve tip is now 1.0mm further towards the cam lobes.
You already have a clearance problem on the other side, can see that as it looks like it was run without shims.
I would not be listening to this guy I'm afraid.
Send the head to Keith, it needs to go to someone who has experience setting these heads up.

First though, measure the overall length of the valves and tell us what it is.
Inlet should be ~ 86.3mm
Exhaust should be ~85.6mm

Also measure machined face to machined face of the head, should be ~ 94.0mm

Will give us some more info to work out what is going on.

Good luck
Red
 
Helo Andy, runt of the litter? It'll be a cracker with a little bit of work! There is a similar model on moto.it in red with the 3C type hump seat. It looks the bees knees.
 
Runt of the litter - perhaps that is what I'll call my bike from now on! - until it's finished.

I saw the red bike on Moto.it - I have similar ideas for mine!

I measured the valves this evening:
INLET: ~ 86.3mm length, ~ 39.45mm Diameter
EXHAUST: ~ 85.6mm length, ~36.27mm Diameter.

So, I think that is as it should be for this type of mod'.

In fairness to my Engineer friend, I took the head to him for a quick visual inspection and his comments were based upon what he saw (valves still in situ'). I have a lot of confidence in him, but, on this occasion I think I will go to someone who has the knowledge and  specialist understanding of these heads / engines and I think I'll take the advice offered on some of the previous posts.

Andy
 
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