Won't idle when warm

[crazy4life]

My bike runs great but it just seems to not want to idle for more than a couple seconds when its warmed up. It'l idle perfectly when cold thou. Any thoughts?

 

[BigRedAF]

Is it the RM85?

Did you use the choke to make it idle when it was cold?

If so and it dies with the choke off when it's hot set the air screw and idle.

 

[crazy4life]

Opps iv sence upgraded to a cr125 :D

 

[IndyMX]

2 strokes don't generally idle for very long.. a few seconds is all.. This is a good thing, you shouldn't be idling a smoker. That is unless you happen to like fouled plugs.

 

[BigRedAF]

Still a 2 stroke, same stuff applies whether it's a 85 or a 125.

 

[crazy4life]

It has a aftermarket carb so there are no external screws to turn or any that i can see even after i cleaned the outside of my carb.

But sence Indy says its a good thing il take his word and just leave it be.

 

[BigRedAF]

No screws, what kind is it, a Blue Magnum?

 

[crazy4life]

Mikuni Corp.

 

[stumanarama]

i think the bike should be able to idle on its own for at least a few minutes, but i guess if it runs strong and you dont need an idle youll be just fine

 

[crazy4life]

Well it would be nice in some circumstances so how would i go about making it idle. I notice that when it idle's cold it idles perfectly. I can make it idle perfect by giving it a TINY amount of throtle. Where would i adjust the idle on this mikuni corp carb? I guess im going to fudge it if i have to take it apart as im not exactly ready for that yet :P

 

[stumanarama]

what i notice is that my bike idles high when its cold with the choke on, and once its warm it slows down a bit, but will idle all the way to timbuktu. the idle adjustment on my bike which has a stock kei hin, is the choke. you twist the knob out to raise the idle, and screw it in to lower it. take a look at your choke and see it says anything on the knob

 

[sixds]

my bike will idle until its warmed up, but it will only idle for about 10 seconds when its warm.

 

[BigRedAF]

That brings back some old memory's. Look at the top off the choke knob. If it has an arrow pull it up then turn in the direction of the arrow to raise the idle.

 

[IndyMX]

If it's the Mikuni TMX, which is what's on my CR125, the idle stop is on the slide.

 

[BigRedAF]

Nice pic Indy, just throwing crap out there since he said he has an after market carb with no screws :coocoo:

 

[IndyMX]

Mikuni is the stock carb for that year CR125.. That pic is straight from the service manual.

 

[Ol'89r]

Adjust your idle when the bike is completly warmed up to operating temp. It will idle at a high rate when cold but will idle down to a normal idle when warmed up.

 

[crazy4life]

She idles!! Thanks everybody. I couldnt see the screw beucase it was covered with greese and grim but iv sence cleaned it all up.

 

[KX250Dad]

Well, now that you know it can idle lower it to where it doesn't once warmed. Indy was correct in his post. You don't idle two strokes, if your idling your not riding... not riding no air movement thru the radiator, and perhaps the worse is your loading up with oil. When stopped for short periods burp the throttle.