Stikman Unfortunately bikes are no different than cars when It comes to people hanging on to old outdated info/wive's tales. Now with the web and reading different forums, my opinion is the vintage bike guys are the worst, they really hang onto the past.
Posted below is a copy of a post of mine from the old cam thread, it pretty much sums ups the 3 pages of discussion.
*** Here are the cam specs taken from Honda service manuals. I have come up with 4 different cams used. I cannot speak on a early sandcast cam, but one of the manuals is dated 1970.
I have listed these in order by power potential, not only by specs but also by running them on my dyno simulation software. They fall in order just as one would expect by reading the specs. This is only to help rate the stock cams, all of these are very mild by any performance standard and should be replaced if more power than stock is wanted.
Hondamatic
Intake open 5 AFTER tdc
Intake closes 30 after bdc
duration 205
intake centerline 97.5
Exhaust open 40 before bbc
exhaust closes 5 before tdc
duration 215
exhaust centerline 107.5
--------------------------------
K model
intake open 5 before tdc
intake close 30 after bbc
duration 215
intake centerline 102.5
Exhaust open 35 before bbc
exhaust close 5 after tdc
duration 220
exhaust centerline 105
-------------------------
K model 77-78
intake open 0 tdc
intake close 40 after bbc
duration 220
intake centerline 110
exhaust open 40 before bbc
exhaust close 0 tdc
duration 220
exhaust centerline 110
---------------------
77 78 F
intake open 5 before tdc
intake close 40 after bbc
duration 225
intake centerline 107.5
exhaust open 40 before bdc
exhaust close 5 after tdc
duration 225
exhaust centerline 107.5
I hope this helps to answer as to which "stock" cam will make the most power.***