yz426 spark plug

4 replies to this topic
  • Clint12

Posted February 06, 2010 - 07:25 AM


Hey fellow motor heads... does anyone know what the proper gaping is for a new spark plug that im putting in my yz426 (2004)?

  • grayracer513

Posted February 06, 2010 - 07:33 AM


Which is it, an '04, or a 426? Can't be both.

(The gap is .024" either way)

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  • Clint12

Posted February 06, 2010 - 07:42 AM


426.. I will double check there year... You are right it cant be both, thanks for the help my man

  • camuchi

Posted February 06, 2010 - 08:02 PM


Factory manual for my 02 shows range of .028 to .031 just did it today.

  • grayracer513

Posted February 07, 2010 - 09:09 AM


The Owner Service Manual calls for 6mm (0.024") on page 2-17. Where do you see the specs you cited?

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