On my first ADV bike (KLR650), I ran a K&N re-usable paper filter; never had a foam filter for it. Most of the guys I ride with would poo-poo the K&N, saying foam is the only way to go. Fast forward to my 790 Adventure R, with a stock paper filter and a PowerParts catalog number for a foam filter. I picked up the foam filter, air filter oil, etc, and proceeded to try to figure out how to oil the filter. Watching some youtube videos showed completely saturating the filter, then squeezing it out. Trying to do so was a huge pain in the a$$ because of the hard rubber suround. I couldn't squeeze enough oil out. I thought I'd gotten enough, but the next morning there was about 3-4oz of air filter oil on the garage floor! Obviously it wasn't right, so I switched back to the paper and cleaned up the mess. Between rides I've been blowing the filter clean-towards-dirty with compressed air, but not really being a 'reusable' filter, I'm worried about doing that for very long. I couldn't find any maintenance information in the manual about cleaning/replacing the air filter. So, this story brings me to the point of the thread: What are other 790 ADV owners doing with air filters? If you bought the foam, how are you ensuring it's properly oiled? As a person never having used foam before, how do I know what "properly oiled" is/looks like? Or maybe you went with the K&N KT-7918? It's listed as the Duke 790 but I'm guessing it fits? Or have you been cleaning and/or replacing the stock paper filter?