I know it's not an ATV but I acquired this to work on and I have no idea what it is other than it's a Chinese scooter of some kind, has a 50CC motor with no manual shifter. Or if anyone has any idea of to what it "could" be. To me, it looks more like a go-ped with a seat lol because of the tiny tires. The tank isn't original and I don't think the front fork assy. is either.

 

It is a Monkey bike, they were popular in the 1960s and mostly made by Honda, who still make them. If yours is Chinese, it is a sort of copy. The engine is Honda Cub, or a Chinese copy of it.

 

I can't wait to see it done. Looks fun.