04 YZ450f timing and valve clearance questions

42 replies to this topic
  • grayracer513

Posted August 12, 2016 - 06:02 AM


Remove the oil pump and see how the pocket where the inner rotor of the pump runs.  If you aren't sure have someone take a look.  The frame can be flushed, but it can be a challenge to get the feed fitting and screen out of the bottom so as to do that.  

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  • NorthernMNSurf

Posted August 12, 2016 - 12:57 PM


I removed the pump and the inner rotor of the pump looks fine to me...no pitting, gouging or chunks missing..the only thing I noticed was the oil pump drive gear being "wobbly" on its axis. What am I looking for?

  • NorthernMNSurf

Posted August 12, 2016 - 08:12 PM


IMG_1471061482.877428.jpg IMG_1471061499.077376.jpg IMG_1471061514.995304.jpg IMG_1471061524.646205.jpg

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