Second, I have never in all my motoring life heard of a piston magically and mysteriously cracking at 14,500 miles. Pistons just don't do that for no reason. If a defective piston is installed in a hi-po engine it is going to fail within a very short time span. Something else caused the problem and this hasn't been investigated near well enough. Replacing the piston and hoping that nothing else goes to he** again is completely unacceptable. A cracked piston is a major situation and shouldn't be taken lightly by anyone.
This issue throws a real red flag up for longevity of the K1600. Is this a one time problem, or is this the start of another major issue for K1600 owners as if there aren't enough already? The jury is still out on that one, but if BMW had an once of brains they would gladly replace the engine with a new one and try to keep this issue under the radar. My guess is they won't do that and they will take the cheapest way out.