just did mine yesterday, with notoil air filter oil...you saturate it, then squeeze out the excess, then work the whole thing with your fingers to restribute the oil...leave it out for 20 minutes for the alcohol to evaporate, and reinstall. It's cool how the whole filter unsnaps to come apart. the screen was also loose in mine, not attached to the plastic frame as noted in the manual. I also made sure there was some notoil on the foam gasket surrounding the filter.
k&n, i don't know...i serviced my triumph k&n filter yesterday, too, and there was a thin film on dirt on the inside of the throttle bodies....I wasn't impressed. the filter was easy to clean and reoil with the kit, at least.