I just installed a 1993 caliper, front wheel, rotor, and forks on my 1989 XR600. I pulled the caliper apart before I installed it, cleaned everything and installed some new brake pads. I bleed the line very well. I use a one man brake bleeder which is a small bottle with a one way valve and a short piece of hose that goes onto the nipple. I can then crack open the nipple, and keep pumping the brake lever. I have used it many times on cars and other bikes and it works really well. Anyway, I can not seem to get a solid brake feel with this setup. I can easily squeeze the lever until it bottoms out. And even with the lever bottomed out, I can still roll the bike if I push really hard. It also seems as if the caliper is not releasing very well. The front rotor rubs qutie a bit making the front tire difficult to spin freely. I did the same on the rear. I added a rear disc setup, bleed the brakes the same, and it works perfect. The front caliper also makes a funny creaking sound when I sqeeze the lever all the way down, and release it. It only makes the creaking sound when I have the lever bottomed out. I am planning on pulling the caliper apart one more time. Any suggestions on what to look for? I may also put on the original (1989) front caliper to compare. Thanks.