Moped does not start

Hello! My little brother bought a moped “Generic Jump 50 4 clock” some time ago. Now the moped started to die. We thought it was the battery. When buying a new battery the moped also ran. After a time it died again and we were told that the battery does not charge when driving. Well, then probably the Lima is broken. After 2 days the moped doesn’t start at all. Engine clacks, nothing behind it. No mechanic wants the could someone help here? PS. The carburettor has been removed, seems to be fine, questionable it was only that after removing so much oil, which smells really strongly of gasoline, has run out (the thing aligns so strongly with gasoline that I thought at the beginning it was just run out of gasoline, but it was oil that you can notice of the consistency and color) I would really appreciate any help. Am not financially in the moment, because it is a China scooter. I’m able to buy him another one.