Fuel Mixture Screw - KX125

Started by KX-Dodger, Oct 29 2009 12:41 AM
11 replies to this topic

  • KX-Dodger

Posted 29 October 2009 - 12:41 AM

#1


Hi,

I'm looking to replace the stock Fuel Mixture Screw with an aftermarket (more accessible) one - but I'm having a hard time finding one for the 03 KX125. I am finding lots of screws but they have not, so far, listing them being for the KX125. Any help locating one would be appreciate! :thumbsup:

Thanks!

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  • minimotos95

Posted 29 October 2009 - 12:56 AM

#2

so far i figured out it uses a tmx38, so does the 03(maybe older too)-10 yz125. might want to look for one for a yz

  • KX-Dodger

Posted 29 October 2009 - 01:20 AM

#3

Thanks - so far I'm not finding any that are listed for the smaller 2 strokes - even the yzs. Thanks for the reply!

  • minimotos95

Posted 29 October 2009 - 01:23 AM

#4

me neither just 4 strokes

  • KX-Dodger

Posted 29 October 2009 - 07:43 AM

#5

I sent a note to JDJetting and they were kind enough to both correct my terminology (should be air screw - not fuel mixture screw) and suggest zip ty racing. I found what I needed there:
http://ziptyracing.c...spx?id=MTA5OA==

Thanks!

  • makKX250

Posted 29 October 2009 - 10:25 AM

#6

Good find!

  • Jayson138

Posted 29 October 2009 - 10:30 AM

#7

Why would you need one? My girlfriend rides and races an 04kx125 and the way I have it jetted for her it never needs to be touched. I think that you should get your jetting right first, then see if you still want an air mixture screw. If all it is is that you are having a hard time getting to it, just loosen the two boots and spin the carb. You don't need to take anything off to get to it.

  • makKX250

Posted 29 October 2009 - 01:14 PM

#8

Jayson138 said:

Why would you need one? My girlfriend rides and races an 04kx125 and the way I have it jetted for her it never needs to be touched. I think that you should get your jetting right first, then see if you still want an air mixture screw. If all it is is that you are having a hard time getting to it, just loosen the two boots and spin the carb. You don't need to take anything off to get to it.

For track riding I agree with you. But up here in the mountains you can go from 40 degrees in the morning at 1500 feet to 70 degrees and 3000 feet in the same day. I guess it would only save me from carrying a small screw driver though......

  • minimotos95

Posted 29 October 2009 - 01:33 PM

#9

+1, i want one for the idle screw(because when its 30 it idles high when its 90+ it idles low) but they dont make them

  • KX-Dodger

Posted 29 October 2009 - 02:21 PM

#10

Got one for my 250f a while back and it really speeds up the adjustments as the temp/humidity changes. For example in the mornings, around here, there is a lot of moisture in the air - by mid day the sunis out and the air is hot/dry. I find them to be pretty handy, and ... they qualify as "bling" ;)

  • Jeekinz

Posted 29 October 2009 - 03:02 PM

#11

Jayson138 said:

Why would you need one? My girlfriend rides and races an 04kx125 and the way I have it jetted for her it never needs to be touched. I think that you should get your jetting right first, then see if you still want an air mixture screw. If all it is is that you are having a hard time getting to it, just loosen the two boots and spin the carb. You don't need to take anything off to get to it.


I saw those years ago along with the modified float bowls and crap before 4 strokes. Sometimes the air screw will vibrate out of adjustment. Yeah, you can get a screwdriver, but having it so accessible is :thumbsup: in my book.


Plus the bling factor. :busted:

  • Jayson138

Posted 30 October 2009 - 06:18 AM

#12

I guess that if you are going through that much of temperature and altitude changes it would make sense. I use one on a 250f, but only because four strokes are so much more tempermental to little things. If you get one make sure it is a good one and you put it in right, because crappy ones will vibrate out.



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