Bog off idle


6 replies to this topic
  • Rich331

Posted July 20, 2007 - 09:06 PM

#1

I have a 07 WR450 and it bogs off idle when you blip the throttle. It does affect it on tight slow trails.

Did all the free mods (AIS removal, gray wire, airbox & exhaust mod) put a 170 main jet, adj fuel/mix screw, and went up to a 48 pilot jet Checked the accelerator pump (spot on) and still have the bog off idle. The leak jet is the only thing I have not changed.:banghead:

Is the leak jet the culprit or is there anything else I'm missing? If it's the leak jet, go to a #40??

Thanks for any input.

  • ARin

Posted July 20, 2007 - 09:52 PM

#2

either a 40 or a 35 or a zero(solder shut)

gotta play around with it, see what works.

  • Rich331

Posted July 21, 2007 - 06:16 PM

#3

Thanks.
I not very comfortable with permanently blocking off the leak jet hole though. Has anyone had this problem and found the leak jet cured the issue??

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  • clark4131

Posted July 21, 2007 - 06:49 PM

#4

Read through the jetting database to get a good baseline setting, adjust your carb, accelerator pump and idle per the manual and then see what you get...SC

  • trailordune

Posted July 21, 2007 - 08:32 PM

#5

Thanks.
I not very comfortable with permanently blocking off the leak jet hole though. Has anyone had this problem and found the leak jet cured the issue??


Almost everyone with a wr and even most 4 strokes with an fcr carb has had this problem and yes changing the leak jet does cure the problem for most. I run a #35 leak with great results but think I would be fine with a 40 and save a little fuel. Time for you to see what's right for your bike/area. :ride:

  • Mutu

Posted July 21, 2007 - 11:14 PM

#6

You could lockwire the accel. pump actuator arm.
Free to do and makes a nice difference.
JD jetting kit comes with o-rings that do the same thing.

  • ccoates445

Posted July 22, 2007 - 03:39 PM

#7

I went to the 40 leak and the thicker o-ring in the jd kit. Spot-on.




 
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