I am looking at buying the new WR450 when it comes out, but I have a couple of questions I hope the list can answer. First is seat height; I am 5'8, ride in the mountains and like to touch the ground from time to time. Is there a kit to lower the seat height? Second question relates to the plastic radiator shrouds. I have been riding XR's for years, and have a bad habit of bouncing my bike off rocks. I'm planning on adding a radiator gaurd, but the WR's plastic bits look pretty vulnerable. Do they tend to get ripped off in trees, or is that a needless worry? Thanks in advance for your help.