I think I found the source of the mystery bearings.
One thing I did not take out of the Final drive housing was the prop shaft.
So I started taking it apart and noticed it had a lot of play in it.
Took it out and the balls form the bearing fell out.
And they were the same size as the mystery ball bearings.
When I bought the bike Dom was nice enough to send me all the spare parts he had. Including replacement ball bearings from his previous build. I took a look at them and notice the ball bearings there were a Double row set.
Checked the parts diagram and it was item 19-34 Part # N72052-2 ball radial -Thrust Double row
So the old bearing was missing an entire row of bearings and the, what looks like brass, housing for them.
I think the bearing fell apart and got chewed up by the prop shaft.
Which explains the balls and brass flakes all over the place.036_bad_prop_Shaft_bearing
, on Flickr
I also notice the u-joint shaft was stiff in one direction. Not sure if it's supposed to be like that or not.
If not that may be what casued the failure of the bearing.
On the old bearing the inside housing was made of brass. On the new one it looks like polymer or something.
it's the off tan color on the new bearing. Is that right?
I'm thinking about replacing the prop shaft U-joint. Is there a better after market one that will work? that has a zerk fitting. Or should I just order the stock ural one?
Once I have that and a few other parts I'll start putting it back together.