WR400F Spark plug

5 replies to this topic
  • nakkas

Posted October 28, 2012 - 05:13 PM


Can some one confirm, in a past thread someone stated that you can use a CR8EK instead of the CR8E. The EK is longer than the standard E.



  • dbart250

Posted October 28, 2012 - 05:44 PM


Are you hell bent on the double electrode or is it all you got? Do you know how much longer it is or are you asking?

  • nakkas

Posted October 28, 2012 - 05:48 PM


The EK is about 3 mm longer. This is what the bike shop gave me.

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  • dbart250

Posted October 28, 2012 - 06:22 PM


My only advice when it comes to engine internals is keep it the same. 3mm is a lot. Id see if the shop will give you what you are supposed to have. Hopefully someone on here will know better tho, that was just my .02.

  • Thommo_400f

Posted October 29, 2012 - 11:40 AM


I've been using the ek version without any issues. It has been much more robust than std when I was having jetting issues. Others would foul in 2 minutes. The ek version would at least keep running.

  • Andrewintas

Posted November 01, 2012 - 12:58 AM


I have a 99 wr 400 with 33000+ kays on it, practically all off road, but i put an iridium plug in it about 20 000km ago, never a problem since


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