Hi Guys,
I have a 1990 K100RS Sonda Special with ABS brakes.
My problem is I would like to know WHY ?? my ABS warning light constantly flashes as a warning as well as the warning light. (middle of instrument cluster lights)
I have a 'reset?? switch on the handlebar cover (alongside the hazard light switch), when pressed it makes the ABS warning light glow constantly as well as the warning light.
I have heard that when you press the reset switch, its supposed to re-callibrate the sensors for the ABS as you ride, ..takes about 5-10klm to 'set' the data.... ??? is this correct. It doesn't do this for me. It just stays on full time after i use the reset switch. If I switch the key off and back on the ABS & war4ning light start the 'flash' again. I have tried to find some data on the ABS systems, maybe they need a bleed as well or something needs to be adjusted??? My brakes work great, but I CAN lock the rear wheel, and I have had the front chattering for a high speed stop, but I don't really use or feel the need for ABS, .. if its easy enough to fix or should I ignore' or disconnect the ABS warning light.

I have only just purchased this bike, before I got it, it was sitting for 2yrs, collecting dust. The rear brake was bled because of insufficient pressure.

Is there an article or some info on the "K"100 ABS system & how to 'adjust / bleed / repair" it.

ALSO
My battery voltage with lights on, @ 2000rpm+ is around the 13.2v - 13.6v ..is this acceptable, I would have thought it should be a bit higher, more like 14v. Lights off is around 13.5v - 13.7v. I have just installed a new battery 400CCA 20Ahr AGM.

ALSO
When I connected up the new battery, noticed a small spark as I finished connecting the Negative to the battery. I realise the clock is a constant source of power drain, but I also heard a relay click in, the Fuel pump relay, (no whirring (priming) just seems that the relay is kept "LIVE" is this correct?? how much drain should i expect over time???

The fuel pump only pumps /primes on ignition start, but why should the relay be kept live, as said, once I tapped the negative terminal to the battery & screwed it onto the battery, the relay became live. Just don't want to come back to a flat battery when i don't use the bike for a few days.....
I have 4 bikes to choose from as well as 2 cars, so it could/ will end up sitting for awhile at some stage.

Any advice would be appreciated, .....
Cheers

The Yowie
All Ozzie & Proud of it!

yowie,
Go to the Download page of Crazy Frog Bert's pages.
All your answers about the ABS are in the forum download section.
Ajays.
any problems let us know.

Thanks Ajay, I was just posting the same answer! You beat me up by 10 seconds.
2 days ago, I also posted a file on ABS 101 (generic and not specific to BMW)

Hi Yowie,
The ABS reset switch latches the flashing to a steady state condition for about 10 minutes and then it starts to flash again and needs to be pressed to latch it again. It does not recalibrate anything. When one wants to reset one grounds the centre pin of the test plug after the ignition is on and presses the reset button for thirty seconds and releases it one then turns off the ignition and then turns it back on. That has reset the ABS fault memory and memorised the reset for the next run.
Regards,
K-BIKE