Crank Blueing...

3 replies to this topic
  • floatingk

Posted February 10, 2009 - 09:17 PM


this morning I was taking the piston out of my 04yz450 and as I got he wrist pin out I looked down and saw the crank near the crank pin TDC very blue. I dont know if this is an issue?

Posted Image

  • grayracer513

Posted February 10, 2009 - 10:38 PM


That is a result of the manufacturing process, and totally normal.

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  • Brad_Aus

Posted February 11, 2009 - 01:47 AM


yea, as he said. I think the pin journals are flame hardened to stop them galling

  • floatingk

Posted February 11, 2009 - 10:31 AM


Sweet! Thanks guys! Im off to put it all back together... with some new rings!!


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