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Non functional idle screw '00 kx250
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Non functional idle screw '00 kx250 - October 22, 2013, 05:20 PM

So, before I pull the carb out and tear it apart is there anything specific that's a likely cause for the idle screw not doing anything? This is for my '00 kx250.
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Non functional idle screw '00 kx250
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Non functional idle screw '00 kx250 - October 22, 2013, 05:25 PM

If it's one of the plastic screws it likely has been damaged over time and doesn't change anything. I'm assuming your bike won't idle and turning the screw clockwise isn't making any difference?
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October 22, 2013, 07:44 PM

The screw goes in and out but has no impact on idle speed. It's not idling very well and with the rekluse in there the bike is stalling on downhills.
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October 22, 2013, 07:51 PM

Quote:
Originally Posted by KirkRoy View Post
The screw goes in and out but has no impact on idle speed. It's not idling very well and with the rekluse in there the bike is stalling on downhills.
Get another idle screw and try that first. Over time they wear out and the bike won't idle. It's a common problem on all modern 2 stroke 125 and 250s. Many manufacturers included a plastic idle screw instead of metal. (KTM) Some used aluminum. I wanna say Yamaha used a steel screw and they hold up better. But either way they all eventually need to be replaced.
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October 22, 2013, 08:16 PM

OK, I'll try that out, thanks!
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October 22, 2013, 09:19 PM

Are you adjusting it with the throttle open? The plastic screw can't take being turned much with the throttle closed.


KTMs and Yamahas
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October 22, 2013, 09:47 PM

My type of wrenching now...



I want my baby back, baby back, baby back....Chileeeeee's bay back...
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Non functional idle screw '00 kx250
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Non functional idle screw '00 kx250 - October 23, 2013, 09:46 AM

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Are you adjusting it with the throttle open? The plastic screw can't take being turned much with the throttle closed.

Ah, I did not know that. The old screw looks ok to me but I ordered a new one ($10 for a plastic screw?).
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October 23, 2013, 09:59 AM

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Ah, I did not know that. The old screw looks ok to me but I ordered a new one ($10 for a plastic screw?).
Yeah that sounds about right.
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October 23, 2013, 12:35 PM

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Yeah that sounds about right.
At least shipping was only $5...
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