I was about to say it is a typical 49cc mini chopper but the closer I look at it that looks like a swapped in motor, maybe from a dirt bike or something. Put some better pictures and a couple other people on here could probably help you better.
I am going to throw it out there and say that that is not stock. It actually looks like a 50cc out of one of those scooter/mopeds. Transmission built in. I have never seen one like that in a mini chopper.
i looked and cant tell that y im teying to get some answers i found vin but cant really decode it too well but i think the motor on it only like 50cc but cant even confirm that because cant find any markings on engine
CY6 are 50cc. Should be perfect a low-power for the kids. I would spray some flammable liquid into the cylinder and see if it fires. I would want to at least run for a few seconds before I worked on anything