Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
The most obvious consideration missed is that the cam lobe (which is the concern here) is absolutely not pressure fed. The cam on the rocker follower is completely at zero oil pressure. It follows that increased oil pressure cannot change this. Oil volume is different from pressure, interelated in a engine, yes. But not the same thing
As you've already stated, and it looks to me too, that the original issues arise from how it's maintained. That tappet clearance is probably the most vital of most engines we'll see on here given the spring loading it must use to get a valve of that size safely above 10,000rpm, with some space above that for safety margin.
this perceived exhaust cam problem has its roots in lack of oil changes and generally poor maintenance
After all, Honda spent millions back then developing this highly sophisticated engine
If anybody could supply me with a complete list of the changes that were made by Honda at the time of the oil pump replacement I would love to upgrade the Bomber, but without that I see no point. Sorry.