Stock Chain is: 530, 112 Links over 10,000 psi yeild. I am a TAME rider. i pull no wheelies, no lockups, no power drops. I have had a clunk/click when letting out clutch as intermittent problem for the last year. Have only 3400 miles. This only happens some of the time, usually when i go down from second to first at a light and the take off slowly when the light goes green. I thought the tranny or the clutch was bad. My chain is fine ( as my inspection has gone). Last week, I let a dealer tech take it out, he got it to click, he then tried again .. no click..he rolled the bike back to where he got the click and got it again.... pointed to a chain problem... bad link, nasty link..........my chain has been always adusted perfectly 1" of play. chain has not stretched much from new. I think chain is nasty; i have always done like the guy who cleans the chain with a towel and wd-40, my chain has always been super clean. I understand the stock chain is DID manufactuure O-ring. I am now looking a a TSUBAKI SIGMA...the stock chain is 112 links ( 530 chain, over 10,000 psi yeild). I have a Blue link stock chain. I am also Totally pissed at suzuki, they are weasels, You will get Richard Coleman if you call. tell him keith laux hates his ass....