hey guys, I just bought a 2012 grizzly 550 EPs from a friend last week. I changed the oil and I figured I would clean the air filter too. When I took the airbox apart all I saw in there was a crappy foam "filter" and the screen behind it. Is this normal? I expected to find a conical type filter inside. I've been searching for answers for two days and I see mainly "conical" or "round" filters rather than the flat foam one that I have. Is that how they come stock? There shouldn't be a filter around the hole at the bottom of the air box? I noticed there was dirt in the bottom of the air box which led me to believe there should be another filter there. It only has 900 miles and 60 hrs on it. Any help for this clueless guy is appreciated.