Sorry for my absence. I got it sorted out, and I thought I'll give you guys an update. It turned out that Wild was spot on with his explanation. The noise was actually two unrelated issues. The squeel was the rust built up in the big end bearing. a fatty mixture and long ride cleared that right up. That grind had me scratching my head for a bit. My first thought was the clutch bell rubbing, and that ended up being correct. Everything pointed to this, but when I removed the clutch cover, no evidence of rubbing on anything, anywhere. The tranny oil had no metallic glitter in it, even after three spill and fills. Long story short, the retaining snap ring, was loose. About half way off, but still secured enough to need the snap ring pliers to remove and re-seat it. the play between the clutch and the crank were proportional to the revs, so If I actually rode it WOT for more than a few minutes, I might have solved this sooner. Of course, I just ended up rebuilding it anyway, but this was bugging me.