i recently purchased a new 2011 YZ450F and getting familar with it while waiting for a day off from work. i haven't even ridden it yet. anyway, i was looking at the fork tubes and noticed that they do not have a teflon/nylon ring like the earlier models have to keep the lower fork gaurds from rubbing, other than a thin wire ring. i looked at a micro-fische and didn't see anything there neither. anyone with some run time experiencing wear on the aluminum fork tubes?