Valve cover ventilation

[benitouk]

Hi guys! I Just found out that my scooter valve cover ventilation nipple has no hose / oil catcher attached to it, meaning that the vapors and oil are spilling directly on the ground....

I was doing some research because I'm not sure what I should put here. I have seen oil catchers both with / without filters attached, what's the difference? If I completely want to upgrade the oil system, should I also include an oil cooler?

Any help is appreciated!