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Message: <blockquote data-quote="eden610" data-source="post: 20890" data-attributes="member: 7567">thanks for the reply, but no the guides were fine. I did tear it down and started over. The upper guide was leaning on chain and had rub marks, Course that was not it. tensioner was reset and everything was reinstalled, engine seem to rotate fine. closed it up. crank engine. engine idled fine. run RPM's up to about 4000 seem ok. engine got warm sound came back. New actuators (cam sprockets), guides, chain.Iam at a lost. maybe one of the new sprockets is bad, don't really know.</blockquote>