Here is another angle.

I have never seen anything like this.  If any of you know what this is I'd appreciate anything you can tell me about it.  It turns free, no evidence of rubbing, rod thrust washers look fine, no discoloration on the rod or the left hand crank throw.

Help!  

Any chance someone tried to heat up the outboard crank bearing to get it off? I've never seed a crank pin welded from the factory.
Realistically, how many folks would have pulled apart the crank and rebuilt it?
Crazy.

Is it welded to the gear to its right ? I am pretty certain I have seen this before, only thing is, I don't remember on which bike. I did weld my XS650 into a 277 crank, that definitely had weld burns in every part of that crank.
Cool.
Srinath.

It is normal I believe......the right side of the crank is a weird color and the other is not.  Your color pattern looks a bit different than the cranks I currently have open - but I don't see how the running engine could color the crank in the manner that yours is colored and still keep the needle bearing or thrust washers intact.

And if your crank got so hot that it blued while running.....I would suspect you would have cooked the oil that came in contact with the hot surface and you would see traces of burned oil sticking to the crank.

(NOTE:  The dark side is the right side.......regardless of how the photos got flipped around while posting).

1 nother more

Thanks very much for the comments & advice.  I appreciate the pictures Dave.  Since I did the initial post, I was able to find several photos of cranks (mostly eBay).  All these things seem to be black on the right and steel-grey/silver on the left.  That's pretty strange.  But I have yet to find any with the black & blue coloration indicative of major localized heating.

I'm not overly concerned since I see no way that the heating could be the result of operation.  It has to be related to manufacturing.  This is a 2016 model that I bought used when it was one-year old.  It had about 1050 miles on it and there is virtually no evidence that it had ever been disassembled.  I'm pretty confident it came from the factory with these black & blue marks.  

I beat it up real good.  If it hasn't failed yet I don't think the black & blue coloration is a problem.  It is very interesting though.  Almost seems like the OEM made some sort of change to their manufacturing process.  Probably figured out a more expedient way to build up the crank, or they welded the pin.

Anybody ever heard of an LS twisting the gudgeon?