Just joined this group as I picked up an old, 06, Outlander 400 Max. Bike will be parked til the end of sled season, late April, and will be doing a full fluid change on it. Noticed that the oil change kit that BRP sells has 2 O rings and a washer. One O ring will be for the filter housing, but what is the other one for? Will probably pick up a couple of O rings to use in case one gets damaged but not planning on changing them every time.