I've been doing my own brake circuit/ABS unit fluid flush annually for my '04 GS since I bought it. (I have a home-made funnel that works nicely for the ABS unit and I figured that if I did the whole procedure once a year, I would lessen the chance of the system taking a crap on me.) Anyway, did the job last night and got an ABS fault when I took it for a test ride. After swearing and looking like a fool in front of my 9-year old, I got to seeing what went wrong. Everything looked good as usual but I thought that I might have left a little too much fluid in one one of the ABS unit reservoirs. I sucked some out with a tube, put everything back together and the fault did not show-up. I wanted to share this in case anyone runs into trouble. I know you can get faults with too little fluid but I was not aware that you can get one with just a tad too much. Anyway, I thought I would pass this on.