Ok, my daughters 110 will not stay running and runs irratically when you have it throttled up..
I've completely cleaned the carb..
New plugs(NGK)
drained fuel, just in case
adjusted idle screw
It acts like there is a firing issue...

Any thoughts on this??

Plug turns black fast...

Thanks,
Ted

 

Have you done a compression test? I'm fairly new to the 4 stroke side of atv's but sounds like your either running very rich, or you have a bad ring/cylinder seal. If your compression is good, I have heard you can lower the needle in the card to lean it up a bit. Do you have good spark?

 

make sure choke is opening all the way