KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: TJXK on August 01, 2013, 10:22:59 AM

Title: 03 KX250 jetting
Post by: TJXK on August 01, 2013, 10:22:59 AM
I'm sorry this is kind of a stupid question, but I'm riding my 03 kx250 in the woods and don't need the kind of power that the pro circuit pipe makes.  I have heard that the stock pipe (which the guy saved and gave to me) has more manageable power. 

Could anyone tell me if this is true?  Also would I need to make any jetting adjustments?   I haven't jetted in nearly a decade so I'm not really sure where to start. 

I'm also getting the 04 powervalve governor spring and a g2 adjustable throttle cam.  I can't afford a gnarly pipe.
Title: Re: 03 KX250 jetting
Post by: Foxx4Beaver on August 01, 2013, 10:36:34 AM
I actually had the same thoughts on the 2000 I just completely rebuilt from top to bottom.
(http://i1179.photobucket.com/albums/x393/foxx4afoxx/mxz-x/002_zps8c6fdcb5.jpg) (http://s1179.photobucket.com/user/foxx4afoxx/media/mxz-x/002_zps8c6fdcb5.jpg.html)

I strapped on a PC setup and wish I had gone the other way and went for a low-end pipe.I found I had to ride it hard and clutch the s**t out of it in the woods to get it to snap for me....sooooo,instead of spending another fortune on an exhaust....I ended up playing with the gearing a bit since I had several sprockets laying around.I'm at 12-48 rite now and it seems to be working for me.
Since you have the stocker...throw it on and see how you like it...and report back. :-D
Title: Re: 03 KX250 jetting
Post by: sandblaster on August 01, 2013, 10:37:19 AM
For what it's worth...
(http://www.oem-cycle.com/forum/download/file.php?id=1113)
Title: Re: 03 KX250 jetting
Post by: Foxx4Beaver on August 01, 2013, 10:48:54 AM
as for my jetting...I'm as follows

Main 158
Pilot 45
Needle N3YE (4 steps leaner over stock)
2nd from top
Power Jet 48
Slide #7

I went much leaner over stock...I don't think my jetting will help you too much,because the 03 and 2000 have different setups I believe.

Title: Re: 03 KX250 jetting
Post by: stevea100m on August 03, 2013, 12:52:47 PM
I know on my 03 with a PC pipe setup I geared mine way goofy 14 and 48 to get it to be able to control it in the woods.