Pre filters

[kfx400rider03]

Question is do you oil you air filters pre filter? Or as known as out wear?

[300ex mxracer]

When I used one I never did. I haven't heard of other people oiling them either.

[togup]

the prefilter is to be kept dry, it is a barrier to help keep the filter clean, i dont have an air box so my filter is exposed to the elements its just an added measure to prolong filter life

[sparks 450]

keep the outerwears dry, no oil.

[Dylan227]

I oiled mine and I had better resultzs

[deathman53]

there is are 2 types of pre-filters, kinda like a nylon windbreaker, but doesn't block air and a thin fabric, almost like a thin breathable shirt. The first type doesn't get oiled, k&n and outerwears are biggest seller of those types. I don't remember the name for the company(s) the make the second type, but that needs to be oiled to be of any good. The second one is called a filter skin and it might be sold by PC racing. I use both types, one on dirtbike and another on quads/atc's. I generally use the pre-filters when riding in sand/mud/water, with no airbox lid, your foam filter is covered with sand in no time, I also use it for dusty mx.