Honda 400ex engine knock

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Uploaded by on Oct 18, 2011

What does this sound like the problem is, its a loud knock but occasional extra loud one. Not the valves

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  • I had the same problem but it only knocked at hard acceleration, was the tensioner. Yours sounds like rod bearing but could also be a crank bearing. Pull the top end and see if the rod moves up and down. Left to right play is ok.

  • bad rod not very long,bad cam chain i depends if its bad enough it will jump time and destroy the top end

  • @hondabeatsyamaha how long do u think a 400ex would last with a bad cam chain or tensioner or rod?

  • cam chain,or tensioner,or rod

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