Gy6 - CAmerican Sportworks Breather Filter?
 

I have a wierd thing I noticed on my buggy compared to the docs, attached to the valve cover, is a hose, which the parts breakout says is a breather hose.. but there is what looks like a large fuel filter attached to it.

Any thoughts on why?

it's a catch can- oil vapor can exit the valve cover so EPA required a device to trap that vapor and not pollute the ground with oil mist.