Maintenance & Technical > KX500 Original

throttle adjustment vs idle adjustment

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95formula847:
i was tinkering with my carb today trying to get my bike to idle. i took a look at the throttle cable where it meets the grip. Theres an adjustment there with a lock nut. Mine is all the way in... could this cause it not to idle? I was gonna just test run it but its started pourin down rain. so sry if its a no brainer question.

dangerous dean:
even with no throttle cable it should still idle,try using the screw on the carb and if that dont work try adjust the mixture screw,i have slack at the top due to not liking being thrown around when i move around on the bike

95formula847:
i took the spring all the way off the idle screw and no matter where that screw is at it does not change the idle at all. It just shuts off after a few seconds.

dsrtrider:
just to clarify; my clymer manual calls the black screw on the carb with the spring on the outside (that you adjust with your fingers) the "idle stop screw".  the small screw below this "that you adjust with a small screwdriver) is called the "pilot air screw".  i jhave tried rotating these screws while bike is on and really doesnt seem to do anything.  What does the pilot air screw do? It it also suppose to affect the idle?

kxpegger:
If your bike is jetted properly and in good mechanical condition both adjustments will actually perform carb adjustments. Not trying to be a wise ass!

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