Offset countershaft sprocket.

[fj johnnie]

 Hein I have had the same experience. Removed the countershaft cover to find a loose sprocket. Tabs on the washer had not held the nut tight. You are correct in that it is not designed to secure clamp load. Because of this I am more cautious about ensuring it does not come loose. The inside of my sprocket cover was chewed by the sprocket. A little disconcerting to say the least. I had not ridden it yet. Thank goodness.