About 4 weeks ago my father-in-law bought my two sons two used bikes. My youngest was given an Apollo DB-21 70cc and it was running fine until last week. I am not a mechanic so I called my father-in-law to try to help me fix the issue and he had me put on a new carburetor that came with the bike. That worked for a few days, but now the bike won't start unless it has some throttle and it dies immediately when the throttle is released and it will not idle. The bike honestly sounds "off" when it's running too. I called my Father-in-law again and he said I need a different carburetor because the choke is on the wrong side. Again, I don't know engines from a mechanical standpoint, but it doesn't seem to me that the choke being on a different side would have any effect on the bike starting. If anyone can help me find a solution I would greatly appreciate it.