KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: chipped tooth on April 24, 2014, 01:43:44 PM

Title: 39.5 PWK jetting help 93 KX250
Post by: chipped tooth on April 24, 2014, 01:43:44 PM

Well I just got it all back together tonight and rode it for the first time.

The carb is supposed to be off a 1991 KX500 but I can't confirm that.

First out it was really fat, 170 main, 60 pilot, and for the life of me I can't read the needle numbers on the paper I wrote them on.... d**n rain LOL

I tried a 48 pilot and air screw out 1.5 and put needle on leanest slot was second down when first checked.
Runs much better but still is not right.

Any help with the jetting on this would be much appreciated.

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: sandblaster on April 24, 2014, 01:47:41 PM

What are the numbers off the side of the carb?

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: chipped tooth on April 24, 2014, 02:24:43 PM

I belive it is V563EF21

Going by old eBay pic.

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: sandblaster on April 24, 2014, 04:37:36 PM

Carb is 90-93

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: chipped tooth on April 26, 2014, 07:53:59 AM

Thanks sandblaster

I'm just goona wait till it's a bit warmer out and spend a day jetting, it's pretty close just maybe a pilot change or 2 and a new needle.
Do a few plug chops for the main.

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: DoldGuy on April 26, 2014, 01:05:44 PM

Chipped,

I'm pretty sure I still have my log book for my 93 at the shop & will dig it out & post my jetting as I used the 39.5 PWK too.

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: DoldGuy on April 27, 2014, 08:07:16 AM

Jetting as follows:

39.5
50 pilot
NOZF Middle Clip
165 Main
#8 Slide
3/4 Air Screw

38
Same as above except,
162 Main & 1 on the Air Screw

DoldGuy

Title: Re: 39.5 PWK jetting help 93 KX250
Post by: chipped tooth on April 27, 2014, 10:34:09 AM

Thanks DoldGuy, I will try it out.