These were one of the first upgrades I did. Makes flushing the brakes very easy. I used a piece of tubing and a mason jar. Also when you open your master cylinder reservoirs, look down in the bottom. If you see something that is not as clear as the fluid it is water/fluid emulsion. I used a syringe to suck all of it out of mine, an eye droper will also work. I did not have much, but it was not going to flush out by its self. Then proceeded to flush the system.
I installed Speed Bleeders on my 1998 Honda Valkyrie Tourer. The installation, and the brake fluid flushing that followed soon thereafter, could not have been any easier.
I highly recommend Speed Bleeders and will be installing them on my SG when the time comes.