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Author Topic: 250 jetting  (Read 2921 times)

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stuart1981

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250 jetting
« on: September 12, 2008, 09:31:07 PM »
hi, does anybody know the correct jetting for a totally standard 1999 kx250?
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Wizzy214

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Re: 250 jetting
« Reply #1 on: October 07, 2008, 03:09:52 PM »
i dont know about standard mine could be
main-160
pilot-45

99 kx250
runs great in the high desert at around 5k feet
and great at 1k
« Last Edit: October 07, 2008, 03:12:04 PM by Wizzy214 »
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Offline Hillclimb#42

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  • Posts: 991
  • '97 kx 500, '96 kx 250, '99 KTM 380
Re: 250 jetting
« Reply #2 on: October 07, 2008, 11:21:42 PM »
158 main, 45 pilot, 3rd clip adjustment, 2 turns out on mixture. Adjust for temps and elevation from there. If you have or install a pipe, FMF and Pro Circuit have jetting recommendations.
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Offline Friar-Tuck

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  • \o/ Live Free or Die
Re: 250 jetting
« Reply #3 on: October 08, 2008, 05:18:18 AM »
   I snooped around a little and there were several posts that seemed to imply a rich condition resulting in fouled plugs with a stock engine at factory jetting for trail riders. 

  My Clymer only shows the 250's to 89.   :?

  ( The '89 is a #7 slide and the plug is a  ngk br9eg  .020-.024)

This was from bills pipes.
http://www.billspipes.com/products/2-stroke/kawasaki/jetting/Kawasaki_KX250_99.html

KAWASAKI   KX 250 (1999)    STOCK PWK 38    
MAIN        158
PILOT       45    
NEEDLE     N3YK    
CLIP         3RD    
AIR SCREW  1 1/2
Float height 15-17mm
 
 Tuck \o/
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