Heres a pic of my 01 grizzly 600. There seems to be an air duct/hose missing. I had put a piece of steel wool there to prevent anything getting in. Id like to know what piece is missing. How important is having it? Assuming it is important. Would i have to order the exact part or can i get some type replacement tubing/hose from a hardware store? Looks like it probbably connects to cvt belt area. This has had me puzzled. Thx.