'08 YZ450 vs a quad? You are so much more badass than your BF. I think you would find the Dunlop D952 to be a good all around tire for your area with good wear. Stick with the 110/90-19 for size. If you went with a 120 width tire you might find the bike a little harder to turn in on corners and perhaps a tendency for the bike to want to stand up in a corner. Some notice it, some don't.