If your drums are wobbling they are getting worn. I would replace them for better efficiency, although it doesn't harm anything to continue using them. You should be able to reverse the drums (and pedals) and get some small improvement. If your drumshaft shows wear, you can slide it out and rotate it 180 degrees for a less worn surface.
I'm not familiar with yakass' tune up recommendations so couldn't comment on your click. Hopefelly, to the extent you disassembled the Drive you greased the drumshaft, sprocket shaft and idler pulley, as the factory does.
Thanks for the tip on drum reversal, read that in another of your threads. I will order a new set, my clicking/creaking's gotta be coming from there...shouldnt have taken the darned thing apart, it was working just fine before!!!!
Yakass' drive maintenance schedule much the same as that suggested by Hobie (actually I think its better!)http://yakass.net/articles/87-equipment ... aintenance
Its just like I'm hitting a bump, theres something out of whack and I cant for the life of me find out what or where....best thing to do is take it all apart again and re-assemble then I will probably have 2 clicks per stroke instead of one!!!!...or who knows maybe it will all 'bed in' better this time!!!!