A few days ago, I installed a set of HEL braided lines on my ZXR. The problem is that I don't seem to have much, if any, more feel than with the 15 year old rubber lines. I still need to pull the lever most of the way to the bar before I can feel anything, and there doesn't seem to be the crisp bite that I was expecting. I am sure that there is no air in the lines. Might it be time for a master cylinder rebuild?