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I have a 2008 809 max xt. The front cylinder is making a horrible knock in the top end at 2000 plus rpm. You can’t hear it at idle and definitely sounds like it’s in the valve train or timing chain. Any ideas what I’m looking for??
 

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2015 Outlander XMR 650
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sounds like it’s in the valve train or timing chain.
You're looking at both valve train and timing chain, tbh. When's the last time you set your valve lash clearance? Checked your timing chain tensioner?
 
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