@John HarrisToday I received a reply to my message to the machine shop, they do use Ra as the surface finish spec and the current pricing is using 0.8 Ra micrometers which is very smooth bearing surface. After measuring the wheel bearing internal diameters a third time I put a maximum diameter spec on the axles and swingarm pivot as well as a minimum diameter. Something interesting, the stock axles are far from round, measuring around the axle at different point shows about a .006" out of roundness.
Also I weighed the stock dog bone rear suspension link with the needle bearing and seals but without the through spacers, and it weighes 332.5 grams. So I drilled 5 holes through the bone starting in the center, worked up to 1/2" holes, then the next 2 holes out are 9/16", couldn't find my 5/8" bit to do the outer most holes larger. These are small enough to not compromise the strength much, the link is far stronger than it needs to be. That removed just over 3/4 of an ounce with its new weight at 310 grams. I will ride with it like this for a while then enlarge the holes.
And a pic:
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Where did you find this dog bone please ?