I finally got around to putting my snorkel on last night and im at @1700 miles so i went ahead and changed the air filter while i was back there. The new air filter came with 2 o rings, 1 for the cover and 1 for the box itself. When i took the air box cover off i noticed there were no o rings on either part from the factory.After i reinstalled the filter with the new o rings there was a noticeable seal between the lid and box now, I got my 1000 back in Oct- Nov of last year so it was one of the early ones but keep an eye out when you service your filter