Fouling plugs like peanuts: KX 125 `04

[aeonj]

I know is a subject already discussed, forgive:
well my KX is fouling a plug a day. :think:
The bike is kinda of new (20hours), I believe the carburation is offset, settings are from factory.

* Plugs used: R6918B-9 and BR9EG.
* Altitude is 50 meters on sea (150 feet).
* Mix 32:1 with the best from bardahl Vba syntronic racing

I have a new Readytorace filter ready to install to get the best conditions.

QUESTIONS:
Any suggestion on carburation settings?
Is it easy to do?

Grazie

 

[MXP1MP]

I ran this in in my '04 drop the pilot one size adjust air screw to 1.5 turns out move the needle clip to #2 position on the stock needle and I dropped the main 2 size to a #400 ran it all the time at 40:1 with the stock R6918B-9 plug owned the bike for year n half put like 80 hrs on it easy only went threw two of those plugs and I only swapped it cause I had put in a new top end.

 

[jdc9q8]

theres some links to a few well written jetting articles

http://www.dirtrider.net/forums3/showthread.php?t=42618