Originally Posted by Buscapé
Sigutech, that's the Hosi-stuff, isn't it ? They're a pain to bleed properly, so I'm pretty sure it's a bleeding problem. I tried to install my Hosi from my 2006 to my 2012 Adv, and I spent almost 2 days fooling around trying to get it working. Finally I was able to bleed it properly by holding the slave on its side, plunger faced down, and tapping it gently. Thus we were able to get out a very persistant bubble of air, located on the outward end of the plunger shaft. It's a construction hickup, once properly bled these slaves are very reliable...
That's probably it. Never thought of pulling the thing off and bleeding it that way. Wasted enough time on it this weekend, I'll give a shot again later in the week.