Originally Posted by MTLago
My name is Kevin. I recently purchased a 2000 K1200RS. I am not "new" to motorcycles, but it was a long time ago when last I had one. This is my first BMW and so far, I am in love. The bike was "dropped" by the last owner at low speed. Most of the damage was cosmetic, but the ABS system no longer works (flashing lights on the indicator panel). Any ideas where I should start looking? The bike runs good, and feels solid on the highway. The only other issue that I have noticed is the "noise" whine, and rattle at an idle (according to this forum, that seems to normal). I will probably have quite a few questions in the future, but for now, this is it... Thanks. It does not yet have fuel QD's. I am sure I will be adding those in the future. Thanks for all the help!
You begin by saying that yours is a year 2000 model - in such case you have the simpler ABSII system. The more complicated Integral-ABS (IABS) is only installed in 2002 (USA export) or most 2001 and later for Europe and Canada.
Contrary to some earlier posting, I will say that with ABSII, when the warning lights are showing a fault , you still have full 100% braking capability - BUT you do not have the additional margin of the ABS function if you lock one of the wheel while braking.
Another particularity of ABSII (compare to IABS) is that a fault is permanent until the system is reset - thus you need to have a GS911 or go to the dealer to reset the fault. Even if the fault is not present anymore, the warning lights will continue to flash until the ABS fault is reset.
The ABSII system has fewer sensors and the internal self-check is more simple (no fuild level sensors). In most cases for ABSII, a fault is caused by either:
1) a low battery voltage
2) one of the wheel sensors is damaged
3) the gap of one of the wheel sensor is incorrect
(must be between 0.020 - 0.022 inch or 0.45 - 0.55 mm)
If you bike was dropped, I would start with item 2 and 3 above and have the dealer reset the fault. The front wheel sensor is more easily damaged during a fall.
Also, just in case some air was introduced in the system, I would also bleed both brakes sub-system (this is more simple on your ABSII system).