Just adjusted the chain on my 81 KZ550 LTD. Was at about 1 and a half inches play, took it down to about 1 inch. Made sure the notches on the adjusters were in the same spot on the swingarm marks. Now the chain 'rattles' as it travels. Didn't do this before. It sounds very rough at times, and occurs regardless of speed (I can even get it to do it just turning the wheel on the centerstand.) I have lubed the chain, and tested the wear at the back sprocket, and it seems ok. Any suggestions?