Hi guys, I just purchased a second hand 2008 YZ450F, according to the hour meter it has done 40 hours so far (who knows when that was fitted). I do not know for sure the prior maintenance history on the bike, it looks in very good condition (face value) and rides very well. I was considering changing all of the bikes fluids. I plan to change oil, coolant, but is it necessary to change brake fluid as well (as this is a little more involved). Is there a way to inspect the brake fluid to see if it requires replacement? The manual suggests changing it every year, but I think this is a bit of overkill.