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Uploaded by TrueHight 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.
bluebird165ag 5 days ago
bad rod not very long,bad cam chain i depends if its bad enough it will jump time and destroy the top end
hondabeatsyamaha 3 months ago
@hondabeatsyamaha how long do u think a 400ex would last with a bad cam chain or tensioner or rod?
TheFearless1456 3 months ago
cam chain,or tensioner,or rod
hondabeatsyamaha 4 months ago
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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.
bluebird165ag 5 days ago
bad rod not very long,bad cam chain i depends if its bad enough it will jump time and destroy the top end
hondabeatsyamaha 3 months ago
@hondabeatsyamaha how long do u think a 400ex would last with a bad cam chain or tensioner or rod?
TheFearless1456 3 months ago
cam chain,or tensioner,or rod
hondabeatsyamaha 4 months ago