"Now I'm suspecting that either the cams weren't hardened, or that I need
to put hardened rockers in?
One thing I did notice is that when the rockers are where you adjust
them there is an angle between the rocker and the top of the valve, as
opposed to being flat. This means that there is a very small surface
hitting the valve when the rocker begins to close, think this could be
the problem ?"
I can tell you that the rocker wear pads are extremely hard. Web cam told
me that Yamaha rockers are much better than Honda rockers. If you look at
one, you will see that the wear pad is actually a separate piece of metal
affixed to the cast rocker, and apparently that metal has very good wear
properties. Web Cam told me that Honda hardens the surface of the cast
rocker which is not as good. As for the cams, I would think that if they
weren't hardened, they would wear off on the nose, not so much on the base
circle, which wouldn't increase your measured clearances. Plus, a common
method of making aftermarket bike cams is to take a stock core and hard
nickel weld on the extra lobe material, then grind to size. I THINK that
this method requires no further heat treatment because nickel hard weld is
very hard.
All that being said, I have no idea what your problem may be; that is very
strange.
The bottom of the valve adjuster screw is actually what contacts the valve
top, and it is machined semi-spherical, so it never sits "flat" on the
valve top. Maybe I am misunderstanding you.
JEremy
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