Unfortunately that is not the case. K&N filters have certainly been tested plenty of times, and every single time they have failed miserably compared to stock filters. Do your own research online. I could post enough information on it to crash the server. I have posted at least 20 different tests already, here is some more information, from a BMW car forum.Ear shave for sure. K+N filters are recommended. As they are an oiled high flow filter they are as good or better then stock. K+N's are proven and tested to filter better the OEM filters and flow better.
I'm going to use them myself. The P/O for my bike did the "Coastering". So I'm going to complete the process and remove the pods and surge box
Go with the ear shave. Look in the Carbs and Fuel threads for VoId Docs' ear shave procedure. It a greatly detailed how to.