Anyone know stock main air jet size on 04?

6 replies to this topic
  • sjwr450

Posted March 08, 2004 - 04:27 PM


  • DeltaT

Posted March 08, 2004 - 06:11 PM


Manual says #165 for US, #160 for others. I'm putting in the JD kit this week, and will tell you what I found there.


PS Met WRSteve at HH. He said you might be interested in riding. I'm in Santa Clara.

  • mtrablue

Posted March 08, 2004 - 06:24 PM


it should be in your manual. the maintenance specs near the front lists the carb stuff including all jets. the '03 shows the main air jet as a 2.0. not sure what that means or where it's even located in the carb.

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  • Indy_WR450

Posted March 08, 2004 - 06:28 PM


200 is stock and not adjustable! Fixed main air jet size on 03's and 04's. :)


Posted March 08, 2004 - 06:28 PM


There actually is no main air jet in the '04 carb. It has a 2.0mm opening cast in the housing but no jet like the earlier carbs.

  • DeltaT

Posted March 08, 2004 - 06:29 PM


Sorry, I thought you meant Main Jet, until I saw your YZ post. The 'Main Air Jet' on the 04 is 2.0 for all countries. Pg. 2-8 in manual has all carb specs.


  • Indy_WR450

Posted March 08, 2004 - 06:41 PM


2.0 mm is 200 main air jet. It is fixed on these bikes but it does exist! :)


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