High altitude jetting


8 replies to this topic
  • Cirus

Posted June 15, 2009 - 04:23 PM

#1

Headed to Cloudcroft the middle of Oct. and need some jetting info for around 9,000'. The bike is '06 450 with JD kit, smog removed, airbox mod, fuel screw, grey wire pulled, and Powercore with Powerbomb header. Anyone know?

  • pablo83

Posted June 16, 2009 - 08:36 PM

#2

Your JD kit should contain the propper jet and needle for 9000 feet. The instructions tell you which one to use and what needle position.

  • Krannie McKranface

Posted June 17, 2009 - 12:37 AM

#3

Fatter needle, or go down with the needle. Bring a smaller main jet just in case.

  • Cirus

Posted June 17, 2009 - 09:13 AM

#4

Your JD kit should contain the propper jet and needle for 9000 feet. The instructions tell you which one to use and what needle position.


I've got the kit but I cant find the instructions, its been a couple of years since I'vd used it. Anyway I can get the instructions?

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  • pablo83

Posted June 17, 2009 - 10:52 AM

#5

I'll post them this afternoon. Remind me if I forget.

  • pablo83

Posted June 17, 2009 - 04:09 PM

#6

JDJetting WR400/426/450:

6000-9000 ft
main jet: #165
needle: red
needle clip position: 5th from top


9000 ft and above
main jet: #160
needle: red
needle clip position: 4th from top

  • Mtn-Track

Posted June 18, 2009 - 05:58 AM

#7

I don't have a JD kit and I have an '08 bike, but I run a 152 main and it's still a little rich at 9000' on up. Just food for thought........:worthy:

  • sausage boy

Posted June 18, 2009 - 07:15 PM

#8

I don't have a JD kit and I have an '08 bike, but I run a 152 main and it's still a little rich at 9000' on up. Just food for thought........:worthy:


where abouts do you ride Mtn-Track? i run a 45 pilot 155 main red needle 3rd down from the top.

  • Mtn-Track

Posted June 19, 2009 - 07:56 AM

#9

where abouts do you ride Mtn-Track? i run a 45 pilot 155 main red needle 3rd down from the top.


I usually ride north of Gould or over to Grand Lake. Above the Walden dunes isn't too bad either. Sometimes the Laramie River Valley, above Alma, or above Centennial, WY. GYTR-AIS removal kit "mystery needle" 2nd from the top.:worthy:




 
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