Woah! Hit the brakes!!!
After watching the video link you shared in your other thread your scooter does in fact have the Walbro style diaphragm carburetor and fuel filter setup that I first linked to
There is no reason to add another in line filter like the one I linked to at amazon or scotto- has in the photo I linked.
You have a HuaSheng 142FL
engine, not a 142F engine.
I am sorry I misled you.
I had the wrong engine in mind.
Here is a link that shares a bit more info on it from Grubee.