I've searched and read quite about the chain and sprockets thru the search. I think I have several issues but maybe a quick post would answer my questions. I have a 98 kat 600 with 35k. I changed the plugs, oil, and filter yesterday. I noticed the chain may have to much slack cause I keep hearing the clunk sound (yes the bike is up on the center stand). So I before i did anything i spun the rear wheel and on the same place where the chain met the sprocket it would bind then clunk. You could actually see the chain partly off of the sprocket at the middle back. So I started the bike and put it in first and let it run in first gear. Not only does the chain bind in the same spot, but when it did the swing arm would actually move 1/4" inch toward sprocket side. I tried loosen, tighten, and etc.... but same thing happens. Can a chain stretch on one end? It's like chain link spacing is off in one section. So maybe worn chain, misaligned, to tight, bent rear sprocket??? Any help would be great.

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