Cylinder head?

2 replies to this topic
  • wsfl420

Posted April 22, 2014 - 03:33 PM


A friend has a yz400f and it has a crack in the head but he welded it and now it leaks out of the drain.

Any thoughts?

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  • The Spanky

Posted April 22, 2014 - 03:44 PM


He didn't fix it right, obviously.


Replace the head.

  • grayracer513

Posted April 22, 2014 - 04:49 PM


The spark plug drain? That means it has a crack running up the plug hole into the coolant jacket. That can be fixed.

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