I'm new to mopeds, as of yesterday, and have run into a problem. I know nothing about small engines (yet), so any help will be appreciated.
I notice a 'ping' sound comging from the front of the engine - almost as if you hit a piece of metal with a screwdriver or something. This sound seems now to be associated with the moped not running even as well as it was yesterday. Stalls when at a complete stop, engine not running smoothly, etc...
Does this ring any bells for anyone? (pardon the pun)