I got the K&N filters with my "Freak" from Brent. I use the K&N filter cleaner and oil on them 2-3 times a season. I also have a K&N on my cage. It keeps everything easy.

If you have a foam filter you can pick-up filter oil at most any parts store or bike shop.

1982 Pontiac Trans Am...K.I.T.T. in progress. "It looks like Darth Vaders bathroom in here..."