ÔÇÖ09 F650GS owner question here. My rear brake fluid has turned (coffee) dark with less than 1100 miles. Should it be changed, or is it just to be expected? Yes, I use my rear break a lot, especially in close quarters for example in a parking lot or to hold my bike in place when IÔÇÖm on a hill waiting for the traffic light to turn green ÔÇô and in San Francisco, thatÔÇÖs about every other light. The bike was purchased new (with less than 14 miles) and both front and rear fluid colors were pale (beer) yellow. So is this dark brake fluid normal?