Just get a valve cover filter for an import at any advance auto or autozone.

 

Click on the camera and check out my pics it also has the part #. You can get the filter here but you need to look it up by part # and leave out the dash in the number (621100)

 

I got one at Kragen Auto parts for like 7.00 and they came in all kinds of anodized colors. I have a pic on my page as well.

 

Thanks for the help everyone. Would anyone recommend riding in muddy and dusty conditions without an airbox? I would have the outerwears but I am still a little iffy about doing it. Are the outerwears waterproof? Where can you get the outerwears for the vent hose filter?