BMW K bikes (Bricks)

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1Back to top Go down    ABS issue on 91 K100RS on Mon Sep 04, 2017 8:23 pm


New member
New member

My son and I have a 91 K100rs that has been stored for many years. He is getting married soon and as one of my presents to him I have decided to get the bike running in good condition again. I pulled it out of storage to find everything in the gas tank to be junk.

I replaced the fuel pump,filter, lines and sending unit. I then rebuilt the front master cylinder and installed a new battery. It had new tires four years ago when put away inside so those seem fine.The bike starts and runs great. But I have an ABS light that wont go out even at speed.

I purchased a code reader and reset the abs and the motronic unit. The ABS wont reset and was flashing a code 6 (ABS relay) until I tried to reset the ABS and now it flashes a code 7 (ABS computer). I recently had carpel tunnel surgery and as my hand is done for the day I was hoping someone could help tell me common things to look for at this point so I have some idea where to start when my hand recovers again!

Thanks so much for any thought you can give me!


2Back to top Go down    Re: ABS issue on 91 K100RS on Mon Sep 04, 2017 9:57 pm


Life time member
Life time member
Step 1: Make sure you're using a good, fully charged battery. ABS brains can be finicky otherwise.

More here:

Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R

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