NAA Governor Rebuild - What to look for

I have a 134 NAA engine that does not respond to the throttle
position correctly. It also speeds up whenever it wants to, slows
down with any load, does not compensate for load changes, etc.
Early flyball type governor.

So I ordered some new gaskets, shaft seal and flyballs hoping to
rebuild it. When I got it apart, the flyballs do not have flat spots.
They look pretty much like the new ones. It was a little gummed
up with older oil, so I've been cleaning it up and inspecting.

I've got the governors off two engines here in front of me.
The thrust bearing in one is shot. The other looks Ok.
Both have a ridge where the thrust bearing rides, one worse
than the other. (the one with the bad bearing)

The cupped portion does have six little flat spots on it that the
one with the bad thrust bearing does not. Pictured.
Could these be enough to cause my symptoms?
There are no groves in the case like I've seen on the N series.
What else should I be looking for that could cause it not to work?

Are you sure the compensating spring is not hanging up on the left corner of the block. BTDT. Like if the governor rod is bent in a little, maybe thanks to a alternator change over in which the lower mounting bracket isn't long enough, so we shove the alternator in to get the belt on!! Do you have 6 of those little holes in that race cup? That could maybe be the problem also. The ball type governor is usually a lot better at doing it's job than the roller on a ramp(new style),in my opinion. But the only thing new available for the ball type is the balls .I have a couple of roller on a ramp governors on the shell, since I try to cabbage on the ever ball type I see, if they are decent.

I didn't find any binding when I looked Wayne, and I did look before I tore it all down like this.
There are actually eight of those flat spots, which seemed unusual.

After some thought, all my tractors have the Dowden foot speed, which allows the governor rod to turn which might have caused my problem. I have seen the races have ball track ditches in them but never a holes like yours show. Still think that might be a problem for you

A little follow up Wayne. The picture shows the thrust washer
track in the back of my cupped race which had the little holes
pictured previously. The cupped race out of the other governor
didn't have those little holes, but the thrust bearing was trashed
and this track/groove was far worse.

Since I can't seem to find these parts and I didn't think I had much
chance of filling in those little holes and getting them anywhere near
close, I decided to fill in this track on the worst one and
grind/sand it down flat. That one didn't have the holes.

Throttle response is now reasonable, although not perfect in range.
The governor works. It holds a steady speed and responds to
changes in load, although a little bit delayed in my opinion.
Keeping in mind that my grinding/sanding wouldn't be perfect,
this is a usable fix, although a LOT of work.

I don't understand how the thrust bearing would have made
those symptoms in this governor since it was still reasonably
good, so I have to think it was those little holes in the cup.
Unless you or someone else has a better explanation.

Again, this is the cupped race with the small holes inside, but
the groove in the other one was far worse than the one pictured.
Bad enough that the thrust bearing race drug. Didn't think I had
much to lose on that one.