Help please

[Dballard87]

I know this forum is for atvs but I need some help here guys

My little brother has. 49 cc Pitt bike he is 9 It has been sitting a while and I just went through and cleaned the carb because it wouldn't start right. So now it revs way up after I adjust the idle and let it run for a bit then it will idle right and then rev wwaaay up again then just sputter out? Not sure what's wrong with it at all but it back and forths one second it high revs then dies down and kills it ?:loco:

 

[lbjamm]

I know, dumb question but it happens. You got plenty of fresh fuel in tank?

 

[Dballard87]

Yeah just filled it up think I'm check the petcock filters in the tank getting plenty of fuel out of the petcock but I'm not sure what else it could be

 

[lbjamm]

Maybe you got an air leak where carb attaches.

 

[Dballard87]

Could be I will check it over again

Anyone else with input hit me up too lol

 

[ChunkyB]

Throttle sticking open? Or if its a round slide is the cap tight and have the seal in the top cap?

 

[Dballard87]

I will def check that out it does have a Little cap on the top maybe the seal is bad

 

[Dballard87]

Nope cap seals fine

 

[ChunkyB]

Dang really only thing vacuum leak between head and carb. Idle screw in to far or throttle hanging up and not closing all the way best I can do no physically being there

 

[jeffsyfm350x]

What about on the vent on your gas cap? Take it off and start it and see what it does. Did you adjust the airfuel mix?

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[Dballard87]

I did adjust the idle screw I may need to check the gas cap thought the overflow tube just rotted off so maybe