I'm planning on heading to Central America for a couple months starting in December. I still have a long was to go before I'm ready but have things pretty much figured out. One thing I'm not sure about is air filter maintenance. The bike I'll be taking is an XR650R. I have a choice between a foam air filter or a K&N filter. I already have both. Both would require carrying oils, and maybe cleaners, etc. How are you maintaining your air filter on the road?