@Apsin, welcome here!
There are two types of CVT casing for your Agility 125 4T.
One with air intake up (1200 hrs) another with air intake forward down (0800 hrs).
Pls see pic for CVT filter (inside CVT casing), rarely to change, if still there, usually it gets brittle and disintegrates after a while, which is not too bad because it consists of plastic mesh and disposes itself through CVTs ventilation system.