Maintenance & Technical > KX500 Original

Idling Problems KX500 1988

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dans89kx500:
Thanks for the suggestions. Yesterday, I took the carb off and shot some carb cleaner through some of the jets (I'm not a experienced mechanic). I did replace the jet, that is connected to the float. I started it up today. It did Idle a bit better, but I still had that out of control, wide open, bomb about to go off idle. When it idles crazy like that, I pull the choke and it idles fine.
I believe it could be the intake boot. It is cracked and my bike does sit covered outside.


Thanks for the suggestions, I will look into all of them. If you have anymore ideas please throw them at me.

Daniel in Vacaville CA

BA500:
Just a guess, but is there a screen inside the fuel petcock which may be clogged?   :|

KXcam22:
An easy check is to run an unlit propane torch over the cracked areas.  An air leak will suck in the propane, richen the mixture and change the idle. Cam.

Hillclimb#42:
 When you pull those jets, you need to look thru them at a light to see that they are clear. Check throttle operation before remounting carb. The slide should slam closed and have just a fuzz of play in the throttle tube. 88 probably has worn slide also. On the other thread, there are some other possibilties to look at.

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