I bought one of these for my daughter used, it has ran good for 30 minutes total. Idles fine, as soon as you give it throttle it sputters and coughs out of the carburetor no power. Cleaned carb, even put a good working carb from a dirt bike in there no change. Please help it's breaking my heart telling my daughter I don't have it fixed yet. New battery and spark plug too.

 

so more throttle it bogs down and dies? hmmm....when you say "cleaned the carb", did you pull the jets out and clean them individually or just spray stuff in there? if you didn't pull the jets out, which i'm presuming you did based on your dirtbike experience, then pull the jets, it sounds like a fuel delivery issue.

 

Took jets out made sure there was daylight. No change.