HELP Jetting -2003 250sx w/ 04 CARB -LOST MY SNAP


2 replies to this topic
  • CRF450_R1

Posted 03 September 2007 - 12:42 PM

#1

I have a 2003 KTM 250sx and I NEED HELP with jetting, I have tried switching jets(pilot and Main) I have tried different needles and have a jd jetting kit I have tried messing with the idle screw. I have a 2003 and a 2004 carb!! I have heard there were changes in 04 to the carb and/or its settings(I dont know for sure) but apparently the 04 does have less snap than the 03 (I thought that was due to more flywheel/crank inertia but no one around here knows aanything.

Right now I have a Jd needle in the 04 carb, with a 172 main and a 40 pilot 1 1/4 turn out, I live in Vancouver Canada and usually ride from sea level to 2500 ft - 750 m. Does anyone out there have any input as to what the best setup is for my bike/conditions. I know this is the place to find out. I am having trouble finding anyone that rides a 250sx these days in the trails (YES I want a 300 too....) Thanks

  • RayIn

Posted 03 September 2007 - 01:29 PM

#2

Here's the stock jetting recommendations for your elevation from 61-78 degrees F

AS: 1.5
PJ: 48
NJ: N3CW clip at 2nd position
MJ: 172

This is for a PWK - 38S AG with a 6.5 slide and 5 mm atomizer

This is straight from the factory repair manual. Can't help you with the '04 carb

  • Larry63r

Posted 03 September 2007 - 10:34 PM

#3

PM me your email address and I will send you the stock jetting chart for the '03' 250SX. I can't send it to you in a PM.




 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

Register Close
If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.