grey wire wr426

10 replies to this topic
  • maxtherat

Posted September 17, 2003 - 08:13 PM


I have recently purchased a 01 wr 426 and I would like to know which grey to cut. I have also read that it makes the bike "more like a yz". What aspect of a yz does that mean? Also does the jetting have to be changed as a result? I will also be changing the throttle stop and cam timing. Any hints or adverse affects?

  • tctrailrider

Posted September 18, 2003 - 05:06 AM


try this

  • dale

Posted September 18, 2003 - 08:17 AM


try this

Is there a similar page for the 426? that is the 250.

  • tctrailrider

Posted September 18, 2003 - 08:26 AM


I have not seen a site like this for the 426, but the "free mods" are the same for the 250 and 426.

  • maxtherat

Posted September 18, 2003 - 03:59 PM


Thanks for the feed back. I'll give that site a shot.

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  • maxtherat

Posted September 20, 2003 - 06:31 PM


can someone post pictures of the wire for me? For some reason i can't download clear pictures from thumperfaq. If not maybe a good description of the particular wires. Just want to make sure I have the right one. Thanks 01 wr426

  • RichBaker

Posted September 22, 2003 - 04:44 PM


Pull the tank, follow the wires from the cdi box to the 1st connector...pull the gray wire from that connector and you're set.

  • Strick

Posted September 28, 2003 - 12:44 PM


Got into a little discussion this weekend regarding the grey (gray) wire mod. Does this completetely remove the rev limiter?


  • SFO

Posted September 28, 2003 - 01:00 PM


No, the rev limiter on the wr still kicks in at 10.5k w/ the wr black box.
This is with the grey wire disconnected.
Checked it on the dyno.

  • Strick

Posted September 28, 2003 - 03:13 PM


What if my bike has the YZ black box? Which it does , BTW.

  • SFO

Posted September 28, 2003 - 03:35 PM


11.5k redline then.


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