Need Some Help Please

[AJBane2006]

I purchased a Used 2009 Bashan Moped from a guy for $50.00 he informed me that it needed a carburetor. t needed a few more things as well but i ordered the carburetor and installed it.. i had it running about 5 times but it wouldnt idle.. the 5th time i held the throttle wide open and the rear wheel was spinning pretty good... and when i took my hand out of the throttle it died again... i haven't been able to get it started since.