2002 WR 426 Crank Flywheel side thread size ??

6 replies to this topic
  • Cigrettman

Posted January 28, 2011 - 09:57 AM


I am an idiot and damaged the threads on the crank !
Any one know what size die I need to repair them ?
Flywheel nut ...

  • byggd

Posted January 30, 2011 - 07:45 AM


Do you have a micrometer and the thread pitch gauge? You should be able to figure it out from the readings.

  • _Hitman47

Posted January 31, 2011 - 04:56 AM


I've got 01 426 and thread is 10 x 1mm as far as i can remember. diameter is 10mm for sure, not sure about step, may be 0.75. will check when I get home.
I had to run a die on mine too, cuz when removing flywheel, puller expanded end of cranckshaft a bit. *reminder for me* tinker with flywheel only with the nut threaded on crankshaft end. :thumbsup:

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  • _Hitman47

Posted January 31, 2011 - 11:36 AM


OK got home at last, the thread is 10mm x 1mm.

  • Cigrettman

Posted February 05, 2011 - 07:23 AM


Thanks _Hitman47 .I ran a couple of tests and what I came up with was 10mm x 1.25 but not sure if that is correct now and still have not done the threads yet..Damaged mine the same way by pulling off the flywheel and yes next time I will leave the nut on !!

  • RichFZR-WR

Posted February 05, 2011 - 12:39 PM


I had to use a thread file on mine today because the puller tool spread the end of the thread to nearly 11mm so i couldn't get the nut back on after the magneto failed.
10 mm thread 1mm pitch.

  • _Hitman47

Posted February 06, 2011 - 05:04 AM


And be sure that that file starts to cut over existing threads and new threads won't be offset to original ones.


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