2008 Wr 450 Jetting

6 replies to this topic
  • aruggiero

Posted April 07, 2009 - 02:08 PM


Just got 2008 WR 450
did AIS and Pro moto billet end cap
seems to be bogging at low rpms
live in N. CA
175 main
50 pilot
4th clip on needle
any help

  • desertlover

Posted April 07, 2009 - 07:42 PM


Do a search for the "WR jetting database" to find what others are using in your area.

  • KennyMc

Posted April 07, 2009 - 07:55 PM


The main seems pretty big. I run a 168 main (JDJetting kit). I have ridden from 2,500' in the desert to 9,400' up in Kennedy Meadows without a problem.

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  • tribalbc

Posted April 07, 2009 - 09:18 PM


Low RPM's=Pilot and your pilot is too rich. Read the setting your fuel screw sticky in the jetting forum.
Your main is probably too rich as well.

With a YZ exhaust system I run a 45 pilot and 168 main.
Riding from 1000' to 5000'

  • aruggiero

Posted April 12, 2009 - 09:28 AM


I changed the main to a 170 still have a little bog 1/4
any help?

  • KennyMc

Posted April 12, 2009 - 10:58 AM


Did you do the o-ring mod to the accelerator pump?

  • aruggiero

Posted April 14, 2009 - 09:39 AM


I dont know what that is can you point me in the right direction



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