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Message: [QUOTE="JustinC, post: 1016692, member: 60445"] Have any of you guys ever swapped out your automatic cam chain tensioners with a manual one? If so, how do you know when you have reached the correct amount of tension? I read about an 06 yz250f that blew up because the engine was downshifted at high rpm and the automatic tensioner failed letting the valves come in contact with the piston. I was told that that if there was a manual tensioer on the bike this wouldn't have happened. [/QUOTE]