where is the grey wire on a wr 400

8 replies to this topic
  • give it some shit

Posted December 11, 2009 - 01:22 AM


could anyone tell me how to do the grey wire mod on my wr 400? eg where abouts is it! and how easily identified it is.

  • drucer

Posted December 11, 2009 - 02:30 PM


i would also like to know as i cant find it under the tank or anywhere



Posted December 11, 2009 - 03:16 PM


I seem to remember that Non US 400's did not have a grey wire. I know my 99' Canadian WR400 did not have a grey wire, or a throttle stop:thumbsup:

I am just recollecting here and am not 100% positive.

  • mrlopez

Posted December 11, 2009 - 05:24 PM


It's around the harness by the top of the head on the trotthle side but I never notice a difference at all on mine

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  • l_campionero

Posted December 11, 2009 - 05:28 PM


I had a '99, and didn't know anything about any 'gray wire' and never had any problem with power. It was a rocketship!


Posted December 11, 2009 - 08:53 PM


It didn't seem to help my 99 much, but at the time i had not removed the airbox lid or uncorked the pipe

Try here for more info


  • give it some shit

Posted December 12, 2009 - 12:55 AM


thanks for the advice, found the wire unplugged it and as you say i cant feel much difference in doing this mod either!..

  • mrlopez

Posted December 12, 2009 - 08:08 AM


Yeah told you so lol

  • l_campionero

Posted December 12, 2009 - 04:49 PM


Yeah told you so lol

I had another guy riding with me in a team hare scramble when my '99 was new. He'd never ridden a four-stroke before, and he was clearing all the doubles on the MX section of the course. He liked it so much, he bought a YZ426 the next year.

could anyone tell me how to do the grey wire mod....and how easily identified it is.

It's the grey one!:cheers:


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