Update - been getting some traction with this lately....
Recently got my 750/4 back together and have been wanting to get this xs engine finished for a long time....sometimes life just gets in the way.
Pulled the engine to disassemble completely, it had been too long for me to comfortably just assemble the top end.
As I had glass beaded the cases there was one thing I wanted to do but never got done, flush the main pressure gallery along the front of the engine (l/r) to confirm cleanliness.
As you can see there was remaining glass bead in the gearbox pressure feed gallery, recommended anyone bead blasting their cases have this done and the starter spigot removed and cleaned behind also.
The outboard rh crank bearing had developed a few marks from sitting for the last 2 years. I had greased the other bearings well and they had suffered no such damage - putting it down to lack of grease when packed away and being exposed on the outer end.
Cases were cleaned,washed,cleaned,washed then blown dry.
Reassembly
Shameless plug for Craig's guide
Ross pistons installed, starting to measuring squish clearances
Playing around with the head
O/s kpmi valves and springs
This is where I'm at today, unfortunately having issues with the 130-y r&d spring kit I purchased from Gary Hoo's.
I'll have to contact either Gary or r&d as you can plainly see the ti retainers have not been machined deep enough to allow full engagement of the locks as compared to the oem retainers and locks in the above photo.
Not sure how this happened...but I'm sure Gary or r&d will be able to help me to sort it out.
In the meantime I'll Continue to check valve/valve clearances as I'm running a shell #1 Cam and o/s valves with custom pistons, don't want things to get messy + get the bronze guides installed.