I have seen alot of air filter housing lids that are not secured into the locating slots at the end (fender side) causing dirt ingestion. The easiest way to change the filter is to loosen the worm clamp and take the hose off, as this hose is not very flexible and may cause the locating tabs to not engage at the housing base. Just FYI

 

Another way to get around the leaky air box is to replace it with an open element intake like the TYMAR.