how to adjust the idle on kx125?

[kx12504]

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ok i am new to the dirt bike thing. i just bought a 2004 kx 125 off the showroom floor and my idle is set too low. when i ride i have to keep on the gas while in neutral to keep it running. i am trying to adjust the idle on it but don't know how. i have looked at some bikes before and most of them have an adjustment screw on the carb but mine does not. please someone let me know how to go about adjusting the idle. thanks.

 

[Morvo]

Dunno if your bike is the same but on my old 1989 KX125 the idle was set via a big screw with a spring in it on the right hand side of the carb. I forget which way you turn it, trial and error :)

 

[kx12504]

yeah thats what i would have figured too, but there is no adjustment screw on the carb anywhere.

 

[biglou]

What about turning the choke knob? Did you get a manual with your bike? Surely it's in there.

 

[kx12504]

no the shop did not have the manual for it when i bought it so they had to order one but i will try the choke knob thing.

 

[holeshot]

It's on the carb. Not a knob, but a brass screw and locknut on the left side.

 

[Troyboykx125]

I have an 04 kx125 as well......the idle adjustment screw is on the carb...its a brass colored screw...just adjust the nut until the screw is out far enuf to make it idle....but keep in mind you will lose a little low end power by making the bike idle...they arent meant to idle.

 

[snapcracker]

I am back on the dirt again from the 80's and 90"s and got a 2006 kx125 that hasn't idled yet. The dealer told me that it was not supposed to. So I believed him. After all, the last kx I rode had a kickstand! but I shouldn't have to gas it all the time to keep it running while I ride either. Can anyone tell me if the brass screw with the jam nut on it is the idle adjustment. It's above the air/fuel mixture screw set at 2 1/4 turns out from seated.

 

[Jasle]

yes thats it. read holeshot's description above.

 

[snapcracker]

Thanks you guys have been a huge help to a problem that has plagued me for a long time.:cool:Could anyone have any info on the factory position of the jet needle. And is there even a to change jets or needle if your not going to be racing :think: