Replaced the drive chain with an o-ring chain.... That mystery wheel hop that came on at 44mph, and left at 48 mph(seemed to be a badly balanced front tire...) is now gone... Who would have thought... One tighter than acceptable link in an otherwise "ok" chain was the culprit.
I also removed the swingarm and cleaned everything, then bored the swingarm bolt for 1/4-28 grease fittings. The bike has 8600 miles, and I bet it was only greased in Japan!
Lastly, I shortened the clutch arm inside the clutch housing.... Take a 1/4" out of it, carefully "TIG" (GTAW for the technically estute) weld it back together, and re-bend it to the correct offset, and voila; nice quick shifts that engage with almost no "clunk", and let out just past halfway on the lever. I am a happy man. I will be making a model of the part for CNC laser cutting, and they will be available to the masses cheaply! The modification does increase lever pressure a small amount, so I would not recommend it if you are running heavier springs.
Cheers,
Fabricator