Just got my new '07 YZ450 and ran it for the initial 5 minutes. Keeping the RPM down and really playing it safe. I slowed to turn around and heard a noise like a low pitch whine, sort of like a Ford power steering pump, if you have heard one. Let it run for another 15-30 sceonds and the noise stopped. No other issues but wonder if there are any checks I should do. Oil and coolant levels are up to spec. Has anyone heard of any problems with water pumps or oil pumps on the YZ? Still in the warranty period but don't want to go there. EDIT: I think it is the clutch. Quites down when pulled in. Seems good, no slipping or fading. Just being paranoid. EDIT 2: Went for another spin about 30 minutes or so. All seems well. Also note some kind of a tinny noise like a loose exhaust pipe or something but have not been able to find it. When I get my skid plate I will try the foam idea, thanks.