What is the best air filter system for the 2010 and up YZ450F. A K'n'N came with the bike and I am not impressed. It doesn't seal well (needs grease) and it kind of floats on the sealing surfaced because it fits loosely. I also had the filter clip pop off and have to use a zip tie to hold it in place. I don't care about added throttle response or anything like that. The bike doesn't need it. I am looking for the best way to keep dirt out of the engine because the K'n'N is not cutting it.