The first time I took my clutch side cover off I noticed a lot of metal in the oil and thought this was totally normal break in Wear & Tear. About the 3rd time I went in and the metal deposits where still contuning I took off the clutch bell and saw where a Small bit of steel had gotten between the Bell and the Clutch shoes and gouged the Bell. I cleaned all of this up and put everything back together. About 200 miles later when 1st gear engagement point was just too high I took everything apart again last night to notch the Shoes and I found the problem.
"The Internal Starr Washer behind the 17 MM Nut that holds the Clutch Assembly on the crank shaft had all but 2 teeth GONE! about 6 of those little teeth that are supposed to aid in holding the nut in place had all broke off. My strongest suggestion is the next time you are in there Remove that washer and Replace it with one made either in the USA or Japan. "DO NOT USE ONE MADE IN CHINA"
The material used almost felt like it was aluminun it was so poor a grade of metal.