ATV Connection Magazine

Help Please-KFX400-Loud Knocking

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Posted by: Bastosako

if its an 03 it may be the cam chain guide is worn where the tensioner makes contact or the chain is stretched. a few 03's had some trouble with this

Posted by: Honeyduck96

Posted this in Kawasaki forum, but thought this forum might provide a larger knowledge base..

Over the last couple of rides the motor on my KFX400 has developed a very loud knocking sound from the right side of engine.
Thought it might be the valves at first because it wasn't too loud, but I checked em and they are within spec.
Listened close to motor and the sound seems to be coming from lower down behind the oil filter I think. Have not checked the cam chain tensioner yet.
Any other thoughts besides taking it in to the stealer?

Posted by: Honeyduck96

Anyone?

Posted by: Honeyduck96

Any info please?

Posted by: Lifes2ShortRideHard

check to see if ur head bolts are not stripped out. on my old EX it would make a really loud pinging and i tapped out the head bolts and replaced them and it went away.

Posted by: kyledc18

On sleds anyways that usually means a crank or crank bearing. Not good, hopefully thats not the case for you.

Posted by: sandman74

ouch -- rod bearing?

Posted by: 440exRulz

crank, valve, or rod?? Thats my suggestions..?