I was riding out of town yesterday when all of a sudden the rear brakes began to lock up. I pulled off the freeway and they were completely locked up. The front brakes opened and closed without any problem but the back one was not working and the tire would not turn at all. It was completely stuck. I was finally able to move the brake pads a little away from the brake wheel using a screwdriver and let a little brake fluid out the nipple. The tire began to turn again. I rode home very careful only using the front brake but had to stop hard all of a sudden and the rear locked up again. I loosened it again and got home not using brakes but downshifted all the way. I cannot remember if the brake fluid has ever been changed for the rear but there have been times when I have added some to the front reservoir. I saw a video in YouTube on how to change the fluids and will attempt. What I need to know is, is there a difference between the braking system on the st1300 and the st1300A? Because I found a brake bleeding video on the ST1300A. I also wanted to find out can I just replace the rear wheels fluid or must I do the entire system. Also I wanted to find out will the calipers still get stuck if I replace the fluid in the rear? I understand they need to be cleaned and I will use a spray solvent to clean them. Is there a particular solvent to use that will not harm the seals? I need to take a trip in a day or two and wanted to take the bike but I do not want to get stuck again. It appears that the hardest part of the fluid replacement is getting the right side siding off in order to get to the reservoir. My biggest question however is if I replace the fluid which is old, will the calipers loosen so they will not stay extended and keep hard pressure on the rear tire or is there more I need to do to them? I am new to this forum and look forward to everyone's knowledge about ST's. When I got the bike I was told it was the first ST1300 in California received. Its been a wonderful bike. I remember riding it down the street when I first got it and other bikers would stop me and admire it. It was a couple months later I understood where it began to hit the other Honda dealers. Its been a great bike. I will never forget when I was riding up the 405 freeway one day and splitting lanes during rush hour when all of a sudden my left mirror came flying off and fell on the freeway. I must have hit someone's car mirror but did not even know or feel it hit. I could not stop until I pulled over to the right shoulder and began walking back on the side of the freeway. When I got to where the mirror casing was I saw it was in the number one lane right on the dividing line and it was rush hour. Cars were going about maybe 5 to 10 miles an hour and all of a sudden an LAPD motorcycle cop appeared in the lane. He saw the mirror and saw me standing in the shoulder. He stopped his bike and put his arms out for all the traffic to stop. The entire freeway came to a complete stop and he beckoned me to run and get my mirror casing. I ran across the freeway. and as I passed him on the way back. I bowed to him in great appreciation. He saved me the cost of a new mirror and casing! Kuddos for the LAPD motorcycle officers!