Originally Posted by bobivey
...I have a 2000 K1200lt, the front brake lever has less free play if I give it a couple of quick pulls ...
Mine '01 does the same from day one on.
At first, I was also suspecting trapped air - and kept re-bleeding to no avail.
I do discount the corroded master-cylinder theory, because the bike was fairly new when I bought it, with this behavior - AND if applied, brake lever remains at its position (does not "sink"), which would indicate a pinhole or damaged seal.
Also, the fact that it's tighter after a few pulls, discounts brake lines; bad lines would be soft at every application - would not get better. You may want to get stainless steel ones for other reasons, but not to cure this issue.
I just decided to live with that. Bike has now over 40k miles and otherwise is fine.
Here is the only theory that I read, that makes sense to me: the caliper pistons. They are supposed to be held only very slightly due to "stiction" and elasticity of the seals and, ideally should move in and out without resistance. Don't forget, the movement is only minute.
This theory is that after a longer period of riding without use, the pistons are backed into the caliper - from vibration and from contact with rotating disk. Once you apply the lever, the pistons move forward and then linger closer to the disk. Subsequent application of lever does not require that much piston movement anymore. After several minutes everything resets back to the relaxed state.
I am not ambitious enough to prove/disprove that. As I said, the bike works for me. I leave well enough alone.