K&N filter for a kx?

[2k2-300exnj]

i bought a K&N for my 300ex and it is great but my uncle has a kx125 and it is running rich so he was just going to take off the lid and put on a K&N with pre filter but when i looked i couldnt find one for his bike do any of you know where i can get one?
sorry but no one looks in the non honda forum and i got the idea from my honda so it is honda related but someone please help

[bigbadbrad]

how do you like that hetricks pipe? does it have a spark arestor? how loud is it?

i dont think k&n makes filters for motocross bikes.