Maintenance & Technical > KX500 Original
Jetting!!! Again and again and again!
KXcam22:
Good,
I think you will find that at your altitude the 168 will be rich. I would suggest changing one thing at a time and starting with a 165 main and your needle clip up one position from center. FYI the clip pos are numbered 1 to 5, top to bottom so stock is #3 and you should start out at #2. Do some plug chops and get a general idea of how it feels. I have used those at 3000' and know they work well. How is the starting and idle with the 50p? Cam.
Good:
Starts great, 2nd or third kick cold and idles great. She definitely has more compression than the '02 CR250 I rode all day Saturday. But, when I'm riding (bike's hot and just after being under load) and pull in the clutch though it surges just for a quick second, then back to normal idle, then surges, then normal, etc. It would be like if I was barely blipping the throttle to keep it going. It does this for a few minutes before resuming a normal idle, but, it will idle fine. Wierd, but fine.
The rattleing noises concern me and I'm scared of a lean condition, but I'll change the needle position to see if that helps. Maybe I'll get some video.
DoldGuy:
Have you checked for an air leak (leak down test)? Sounds as the intermittent jetting issues could be just that.
Good:
I wouldn't have a clue as to how to perform that.
Here's a couple vids. I don't know if you can see the smoke. This is with week-old Maxima Super M at 32:1 that I had mixed up for the weedeater. Some of the dust is from the vibration of the rear tire in the dirt. I'm either binging the throttle or completely off it. You can hear the idle surges that I'm talking about. Under full throttle, it actually still looks rich to me. Let me know what you think. :mrgreen:
http://www.youtube.com/watch?v=4-CV8lXctqU
http://www.youtube.com/watch?v=Ly4gsJg1wy0
KXcam22:
Good,
It would be helpful to label what your present jetting is each post. What main and pilot are you running right now? Cam.
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