Quess you already figured it out, but the only possble place seems the kickstart axle yeah. The bearinglike thingie goed on the clutch cilinder, the other ring with the edge goes on top of the clutch, than put it back together. Lay it down to prefent fingers of the clutch sitting wrong, make sure waterpump axle is sitting right, and make sure you dont drop the clutch bearingring.
Also prefent clutch oil from getting into your engine. There should probably be mineral oil in the clutch system, but you dont want to have dot in your engine oil.
Measurements you can take:
Fingers to clutch hight
Clutch pack thickness.
Some things that could cause clutch drag:
Wrong adjustment of master cilinder
Air in system
Clutch pack too thick (see e.g. http://www.advrider.com/forums/showthread.php?t=904203)