Maintenance & Technical > KX500 Original
Jetting!!! Again and again and again!
Friar-Tuck:
I'm in agreement with Cam, if you can, get a 55 & 52 pilot.
Tuck\o/
martinfan30:
OK, thanks fellas. I will do. I'll try a 55 first and run it. I'm curious why I have the "R" needle. It's two steps leaner than the stock "M" needle... It's at the second from the top in the clip position. So I have a much leaner 1/8 to 2/3 throttle range...
I take it that the 165 main compensates for the lean needle setting...
I am getting lots of splooge coming out of the head pipe flange. Oil mix, or jetting I wonder. 32:1 Maxima Castor oil.
BTW, what series jets are the pilots?
KXcam22:
The jets are the same as current KTM 300 jets. Most dealers have a multi-box kit of misc jets for the Kehin. Some of the splooge might be the 32:1. You can make your own decision but I am not a fan of rich premixes. I ran 60:1 in mine. The needle acts more to the 1/4 to 3/4 range with the pilot jet overlapping the 1/4 and the main overrlapping the 3/4. Before you go too far the first thing to verify is that the float is set correctly. Then from there change only one thing at a time. The 55 is a good start. The M needle is adequate and can be made to run nicely but it is not perfect. I think a different needle taper is required. JD jetting made them for awhile but they are no longer available. YOu can be our ginea pig and we will see how well we can get your bike to run with the R. I'll bet at your altitude it will run great. Cam.
martinfan30:
--- Quote from: KXcam22 on February 02, 2009, 02:10:36 PM ---The jets are the same as current KTM 300 jets. Most dealers have a multi-box kit of misc jets for the Kehin. Some of the splooge might be the 32:1. You can make your own decision but I am not a fan of rich premixes. I ran 60:1 in mine. The needle acts more to the 1/4 to 3/4 range with the pilot jet overlapping the 1/4 and the main overrlapping the 3/4. Before you go too far the first thing to verify is that the float is set correctly. Then from there change only one thing at a time. The 55 is a good start. The M needle is adequate and can be made to run nicely but it is not perfect. I think a different needle taper is required. JD jetting made them for awhile but they are no longer available. YOu can be our ginea pig and we will see how well we can get your bike to run with the R. I'll bet at your altitude it will run great. Cam.
--- End quote ---
OK, I'll try first the 55 pilot and set the float level. I will search for a thread on the float level, unless you have a thread in mind to check it.
I am also thinking of switching to 40:1 and still use Maxima Castor. Smells good, smells like victory! I'd bet, some of the lazyness, off the bottom might go away.
Friar-Tuck:
Float Level Adjustment :
http://justkdx.dirtrider.net/floatlevel.html
Keihin Pilot N424-21 (style)
Note: to order a #55 would look like this: N424-21055
(series # & Jet size)
Fits PWK (Kawasaki Motocross), FCR-MX (aftermarket),
PJ,PWM (Honda Moto-X Atv), PE 20,22,26-30(Honda Moto-X, Atv)
I like the Maxima 927 myself, I ran that until I got a deal on the Blue Marble stuff.
I guy at work sold his Bass Boat and gave me Three gallons. So far so good...
(I'm not gonna open a can of worms on oil)
If you don't like the 40:1 you can always switch back. I think you'll be fine.
I had run 60:1 for a while with the 927 and had no problems. But I don't spend much time over 1/2 throttle.
Tuck\o/
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