Maintenance & Technical > KX250 / KX125

Pre mix

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redlined_KX500:
 Stock specs are the same from 1990-1999 per Clymer. 2000 on only slight changes.
 
 168 main
 N82/M needle, clip in 3rd slot
 60 pilot
 air screw at 1.5 turns out
 float height  15-17mm

I have a 99 K5. I mix mobil1 2T with straight C12 at 50:1 with 165 main main, 55 pilot, air srew at 2 turns.  Only mods are PC works, reed spacer, V-force and Eric Gorr ported cylinder.  Bike is slightly rich until it hits operating temp then it runs like a striped ape.

Oh yeah I run the bike in an average of 700 foot elevation range

pkbarbiedoll:
Mine had a 158 main in it so I'm bumping that down to 155.   Here's hoping my bike's drooling problem stops!

Hammer 4:
Hmmm, my 99 kx 250 came with a 158 main 52 slow jet. I rejetted using a 155 main, 45 slow jet, and air screw turned out 1 1/2 turns, my plug looks really good. Also I mix Spectro full synth at 52:1 using Chevron 91 octane. I use a uni air filter, have a FMF fatty pipe.

pkbarbiedoll:
I raced mine today with 155 main and 42 pilot.. better but still a little drool showing near the pipe/silencer connection. 

Hammer 4:

--- Quote from: pkbarbiedoll on March 11, 2007, 01:45:52 PM ---I raced mine today with 155 main and 42 pilot.. better but still a little drool showing near the pipe/silencer connection. 

--- End quote ---

What elevation are you at..?  Have you repacked the silencer yet.?

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