Originally Posted by grndzr0
Not sure where I read it... but one of the BMW techs around here said that when you first start moving, it is sort of an ABS calibration period. At this time, it figures the difference in wheel speeds for different size wheels. Also, several people have done wheel size conversions without reprogramming anything and did not have any adverse effects.
If that's correct then that's great and it might be that's why it takes a couple of wheel revolutions before the Brake Failure light extinguishes each time you fire up the bike and ride off. However, I think it's as well to know that and the fact that the ABS begins to take effect long before the wheels lock up.