I never removed the black magnetic drain plug on the bottom of the trans before because the cat. needed to come off to gain access. I found a short 3/8 bolt that has a 9/16 hex fit's perfectly. I put on two nuts and used a wrench to remove the plug with the exhaust in place.
I would soon find out that despite the service manual making no reference to remove and clean this plug for normal maintenance, not doing so was a major blunder on my part. The plug was absolutely filled with super fine metallic fuzz. I cleaned it up , refilled the trans and decided to take the bike for one last ride around the block to listen to the grinding noise one more time and to shoot the video. I should mention I drained the final drive just to make sure That the noise wasn't being transmitted somehow to the trans. Nothing at all was found on the drain plug.
Here is a picture after I cleaned the trans plug once already. I rode the bike less than a mile and managed to pic up this much more debris!!!
You can bet that this will be coming out at every service from now on!