Does the 04 450 need the BK Mod?

4 replies to this topic
  • Blue...ByeU

Posted April 19, 2004 - 07:56 AM


Just wondering if the new ones need this mod? Picking mine up this week. My 02 426 ran much better with the BK. Thanks! :)

  • ddialogue

Posted April 19, 2004 - 08:40 AM


I don't believe the WR450's (2003 OR 2004) needs the bk mod done. I haven't done mine on my '03 and it runs great. I did have to do it to my '02, though.

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  • Blue...ByeU

Posted April 20, 2004 - 05:44 AM


That would be great. Anybody else know for sure? :)

  • dez4ever

Posted April 21, 2004 - 08:33 AM


I was told by James Dean that the carb on 03-04's do not need the mod.

  • jerryls

Posted April 21, 2004 - 01:04 PM


03-04 don't need the BK (sorry to repeat that). There is a screw to adjust the squirt. Look in your owner's manual. And I did have to change the leak jet to a #40 for best results.


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