Put brand new carb in ran great for about three minutes but now when idling it runs fine but when driven bogs down. I tried setting air to gas ratio screw and set idle screw which i got to work just fine but still bogs down when trying to go full speed on a 50cc chinese kids atv. help what could be the issue?

 

If it ran right for any length of time, some dirt must have got into the main jet to stop it running right now.

 

That's what I had assumed that so I already cleaned the carburetor and it still does it not sure if it's getting enough gas when trying to go full throttle

 

Is it auto choke? If so it may have been running on choke for the first three min, then runs badly once choke is off. If so, you probably have a carb fitted with the wrong main jet.

 

no it does not have auto choke . But it's a 50cc Chinese kids ATV if that helps at all.