YZ125 Idling High

carson_t
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carson_t
I have a 2016 YZ125.

I was getting my bike ready for the season, and I noticed it was idling higher than I would like it to so I went to adjust it.

If I turn the idle screw either way it increases the idle, why is this?
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kb228
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kb228 4/2/2020 5:39am
4/2/2020 5:39am
Cant tell you why but if it ran fine last year the carb probably just needs cleaned.
carson_t
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carson_t 4/2/2020 8:50am
4/2/2020 8:50am
kb228 wrote:
Cant tell you why but if it ran fine last year the carb probably just needs cleaned.
Cleaned carb and everything. It’s still a little cooler here like 45-50 degrees and I’m jetted for summer.

Would the cooler weather with summer jetting make my idle screw increase idle either way I turn it?
FGR01
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FGR01 4/2/2020 10:25am
4/2/2020 10:25am
Are you sure you're turning the idle speed adjustment screw and not the air screw (idle mixture screw) ?

Idle speed is the phillips one you have to loosen a small locknut on first. Air screw is the slotted one with no locknut further back by the airboot.
carson_t
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carson_t 4/2/2020 2:57pm
4/2/2020 2:57pm
FGR01 wrote:
Are you sure you're turning the idle speed adjustment screw and not the air screw (idle mixture screw) ? Idle speed is the phillips one you...
Are you sure you're turning the idle speed adjustment screw and not the air screw (idle mixture screw) ?

Idle speed is the phillips one you have to loosen a small locknut on first. Air screw is the slotted one with no locknut further back by the airboot.
Yes I am positive I’m turning the right screw

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FGR01
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FGR01 4/4/2020 8:02pm
4/4/2020 8:02pm
Sounds like you need to take the carb apart and give it a good cleaning. Especially the pilot jet.

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