low idle then shutting off when warm:(

[ipwnr]

ok i have a pocket bike 39cc that will run and ride perfectly but when i let it warm up buy riding it around and when i have to stop for a stop sigh or something it will idle rally low and if i leave it it will just shut off and if i wait too long and give it a little throttle it will shut off and it will still start the first pull after shutting off i also did get new piston rings for it so compression shouldn't be a problem. any one know whats the problem??

 

[CaptCanadia]

Turn up your idle screw see if that helps.

 

[Russ2251]

Carb adjust.

 

[j.concepcion54321]

Mine did the same thing. First thing I did was boil the whole carb in some lemon juice to get it cleand up. And then I gave it a good spraying with some carb cleaner. Then just put it back together and screwd the idle screw all the way in and started it on a stand. It was obviously revving really high so ui turned it off pulled out the screw a lil. And di the same again and again until it was idling perfect then I rode it around a little, and came back, turned it off and then started it up again to make sure it was still good, sure enough it was. I've never had any problems since that.

So my suggestion is to adjust the idle screw. In a little bit and if that doesn't work then give the carb a good cleaning.

Another thing is to try changing the sparkplug. If its at all black then thisll really help

 

[ipwnr]

o srry i forgot to write that when i start it when its cold it will idle fine and when it warms up it just idles very low and when i bring the idle speed up it will want to roll off on its own when i try to start it again when its cold

 

[CaptCanadia]

Clean your carb thoroughly.