Hello. About to pull the trigger on a 85 K100rs. Any wise advice for the n00b?

[The Mighty Gryphon]

These are the parts you need for ABS:

1. Pickup ring for wheel speed sensor
2. Modulator controls brake pressure when wheel locks up
3. The "brain" that controls everything is an electronics box that hides in the tail cowl.


DSCN3145_LI.jpg (95.5 kB . 768x555 - viewed 294 times)

[Krautpleaser]

So, just look for the cans clearly labeled "ABS"... got it 
Great background on FYK. If I love the bike, I'll totally go with the myth :)
But it does explain why he might've advertised it as 86, which is def sketch.

[daveson]

Possibly first registered in '86, which is an innocent explanation.

Bricks were the first bikes in the world with ABS. Maybe he read this, which is true, but I think it was optional.

[rbm]

These are the parts you need for ABS:

1. Pickup ring for wheel speed sensor
2. Modulator controls brake pressure when wheel locks up
3. The "brain" that controls everything is an electronics box that hides in the tail cowl.

4. pickup ring on front rotor and visible sensor mounted on left fork leg.
5. small blue relays in the relay box.

[Chaos]

These are the parts you need for ABS:

annoying flashing red light in speedo pod

[The Mighty Gryphon]

Yeah, the flashing light.  I only mentioned the parts in my photo.  Obviously, if they're not there, the bike is unlikely to have ABS. 

[volador]

BMW ABS app works on iPhone 12 and Android 10.

Just installed the ABS app on my iPhone 12 Pro. Need to synchronize with Bluetooth v5.0 ABS sensors on the 84...

[alabrew]

Looks like it is at Blue Moon Cycle in Norcross, GA.
https://www.cycletrader.com/listing/1986-BMW-K100RS-5014821717
Surprised they would make those errors, they should know better, they have been around a long time and have a vintage museum.