Removing the Grey wire on a 05 WR450F.

10 replies to this topic
  • Al Curtis

Posted July 07, 2005 - 01:27 PM


I bought an 05 WR450F a couple of weeks ago, WOW, Big change from an (nobody laugh now) 83 XR350. I had the dealer take out the throttle stop and change the pipe tip. I will be re-jetting and removing the AIS. Can anyone tell me how removing the Grey wire will affect the performance, I know it changes the timing to that of the YZ but, is it going to be noticeable? Can I change it back or does it change it permanently.

  • WGP

Posted July 07, 2005 - 02:23 PM


Do a search, us who bought this bike right when it came out already busted this topic :)

  • byggd

Posted July 07, 2005 - 03:37 PM


Below 1/2 throttle you won't notice a difference IMO. After 1/2 throttle the TPS sends a signal and the timing stops advancing and retards some (15 degrees I think I read). Some people put a toggle switch on the grey wire so they can switch between wr and yz timing but from what I understand you have to shut the bike off for it to take effect.

  • Texas4play

Posted July 07, 2005 - 03:52 PM


I unplugged mine and never looked back ...

  • Dodjy

Posted July 07, 2005 - 06:44 PM


Does anyone know if you can do this mod on the Aussie bikes?

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  • Al Curtis

Posted July 07, 2005 - 07:24 PM


Thanks guys, I'll try it, and I like the toggle switch idea.

  • Al Curtis

Posted July 07, 2005 - 07:41 PM


Sorry I'm new at this,how do I do a search on passed talks?

  • Matty05

Posted July 08, 2005 - 02:25 AM


Does anyone know if you can do this mod on the Aussie bikes?

Only '05 450's I think from what I have read. I have did the mod and I don't know if it has did anything. :)

  • byggd

Posted July 08, 2005 - 04:19 AM


Sorry I'm new at this,how do I do a search on passed talks?

Go all the way to the top right and click search. You can search by key phrase, room, date etc :)

  • Al Curtis

Posted July 08, 2005 - 06:12 AM



  • alfa

Posted July 08, 2005 - 01:38 PM


You will notice a difference in the higher rpm range. Yes you can put it back. I read somewhere that you should not pull the grey wire out of it's boot beacuse it will mess up the water proff seal for the other wires on that connector. I cut the wire about half way so I can splice it back together it I wanted to. But I don't.


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