Do you put any grease on the bottom surface of the filter where it contacts the air box as recommended in the manual? If not you may have had a leak in the sealing area. I am willing to bet that the lack of grease around the air filter where it contacts the box is part of the problem. But what do I know. I too use the white lithium grease and the PJ1 spray on filter oil. I love the smell. That reminds me, I need some more lithium grease.