It seems to be agreed that it is a good idea to periodically remove and replace the brake and clutch fluid. But this is not a simple task for the ordinary ST1300 rider and it is not inexpensive to have it done by a Honda Dealer. I am wondering if the result could be achieved in an easier and more simple way. Would it work to use a vacuum device to suck the fluid out of the reservoir such that you do not uncover the port to the piston, fill the reservoir with new fluid, ride for a day or so, and then repeat the process several more times. Would the new fluid that you added to the reservoir get to the brake piston in a reasonable amount of time? If the fluid does indeed circulate in the system then changing the fluid over time using this method should do the job. Could the same procedure work for changing the coolant?