you are doing fantastic man i of little faith should have known
stuff that is bad but you wouldn't know it
the pump arm ecentric drive off the back of the clutch ,very common to be worn ,any slop decreases volume of oil in theory .check it and its tiny feed hole you want minimum clearance there,the ecentric drive, i have seen them looser than an apricot fed gooses butthole
i mean if you have .25 mm slop thats too much ,see the extra clearance also makjes it run hotter cause the oil just cant stay in the eccentric if its sloppy
check the cam journals for overall clearance the specs are in the manual
dont bother even putting together pitted cam or rockers
replace them pay now or pay a lot more later
the mod that pj describes is good one in my opinion but no good if that ecentric is shortening the stroke and flow of oil before it gets there
be sure and replace the orings at the cylinder liners this keeps oil from getting in between the liners and the cast aluminum cylinder block inhibiting heat transfer amongst othe issues
make the camshaft endplay right at the minumum or a bit less its safe to do so .this will help keep oil up in the journals
i have have loads of excellent engine parts cant give them away but am happy to sell to you and ship at a fair sell price
the cam roller rubber wheells,and guides, none of them from a used 45 years old cb is any good you must replace them if original
there is an excellent aftermarket slipper tensioner well worth the money in my mind
you can set the cam endplay on the bench with just the cam the 2 gaskets ,end hgousings and the rocker box no need for anything else to set that dimension well before final assembly use a dila indicator axially at cam end points end,to chreck play
more will come to me
oh yah i will be posting my 350 build soon i am doing a cb450 clutch basketr and primary gear and pump eccentric
it gives about 10% more pump strokes for any given engine rpm and the ecentric is got more diameter and surface more durable
plus it is spinning the trans and clutch faster(10%) reducing loads on both,gearbox and clutch,it tightens up the gearbox ratios and allows more options for sprockets ,final drive
but that is not needed for you just make sure the oiling is up to tip top specs
make sure both ends of the cam followers are good many look fine on the large pad but are rusted on the valve tip end and you cannot do anything about it
it happens when sitting for years and the valve is open
i have nos and very excellent cams and rocker arms all i need is your lira or yen or whatever you call em shallooms ?
peace