opinions on that magic grey wire

14 replies to this topic
  • ch0g

Posted December 01, 2004 - 01:27 PM


hey guys :cry:

i wanna know what everyone thinks about their grey wire experiences. some ppl say huge, others say none, let us know your setups :cry:


  • timvv51

Posted December 01, 2004 - 04:10 PM


couldnt really tell a difference on my 03. Thing has more power than I need most of the time anyway.

  • Endurordr

Posted December 01, 2004 - 04:25 PM


This should be interesting. :cry:

  • cruise

Posted December 01, 2004 - 06:02 PM


i recon it made mine rev better more like my friends yz

  • obermeyer

Posted December 01, 2004 - 06:24 PM


No change I can tell

  • wrooster

Posted December 01, 2004 - 06:42 PM



just FYI

we studied the effects of the grey wire mod on the 250F:

summary: on the 250F, it does indeed change the ignition mapping.

jim aka the wrooster
'01 wr250f

  • 5valve

Posted December 01, 2004 - 11:54 PM


euro models come with grey disconnected
it must be some restriction (environment, power)

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  • Indy_WR450

Posted December 02, 2004 - 05:02 AM


Grey wire mod really works. Just do it. :cry:

  • thumpinTed

Posted December 05, 2004 - 04:29 AM


I noticed that the motor revved up quicker from the mid to top and possibly gained a few hundred rpm before the rev limiter kicks in, which I try to avoid. I also heard the gray wire on US model WRs when disconnected gives an additional 5 deg of spark advance. A stock WR is only capeable of 50% throttle opening (the stop that is cut or a YZ throttle stop installed) wont need any more advance if the TPS value is maxed at 50% in stock corked exhaust trim. Then theres the exhaust cam timing WR OR YZ

  • dirtr1der

Posted December 05, 2004 - 09:44 AM


Did the grey and blue wire at the same time. Seems to get close to the limit much quicker now. Mostly from mid range rpm.

  • purluvwr450

Posted December 05, 2004 - 09:47 AM


Blue wire?

  • Top

Posted December 06, 2004 - 06:24 AM


Blue wire?

Ditto :cry: :cry:

Why can't a guy just clip the grey wire, try it out and see if there really is a diffrence? If he doesn't like it, just hook it back up? :cry:

  • ch0g

Posted December 06, 2004 - 06:35 AM


blue wire?

  • Indy_WR450

Posted December 06, 2004 - 07:00 AM


Sky blue wire needs to also be pulled to improve spark voltage during start up.
This is independant of the gery wire mod. :cry:

  • Treebanger

Posted December 06, 2004 - 07:20 AM


Revs quicker in the mid range!!!


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