Found some small iron particles in filter. ????

4 replies to this topic
  • risktaker

Posted November 14, 2007 - 10:42 AM


I was changing the oil filter on an 01 Yamaha WR 426. There were about 50 small pieces of iron, since they were attracted by a magnet, in the filter. They were slightly smaller than 0.5mm. Maybe even smaller. Should I tear some of the engine down to see if I can find the problem or is this common? I hear no strange noises and it runs great.

Thanks in advance for any help and/or advice.

  • risktaker

Posted November 14, 2007 - 11:00 AM


Okay. Nevermind. I searched some more for this info and came upon some answers. Looks like it's okay. If anyone disagrees, please let me know. Now off to find a new gas tank since mine now has an 8 inc:censored: :thumbsup: h crack in it. :ride:

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  • LJ

Posted November 14, 2007 - 01:26 PM


Hi started to see some material in my 99 yz400. It turned out to be the clutch basket shock springs (not the clutch springs) coming apart.

  • LJ

Posted November 14, 2007 - 01:33 PM


One more thing, check you mag/flywheel. It sucks up all of the debri in your engine because its a fairly strong magnet spinning in the oil. I found some good sizes of spring material stuck to it. You have to pull the flywheel off to and look inside to see all of the debri.

  • risktaker

Posted November 14, 2007 - 03:45 PM


Thanks for the advice. I investigated it some more tonight and found it to be mostly aluminum with a small amount of steel powder. I will tear into the engine once the snow is here to stay. I figure I can get a few more weekends out of the bike first.

Thanks again.


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