Join Date: Apr 2008
Location: Hales Corners, WI, USA
ABS catch & release, my 93 RS
Do what Flying duck says.
It;s not throwing a fault code yet, but it's very very close.
Mine was doing this after I had the wheels powder coated. I also had those front spacers done on the axel. The coating was just thick enough to alter the sensor gap.
First ride was AOK. Then I'm rolling up on traffic and I feel pressure on the hand lever, but the bike is NOT stopping! FARK!!! Hard on the rear, hard on the front brake and the front engages hard, very grabby. Seemed like low speed modulation at the hand lever was way way off.
The front brake worked fine if applied firmly. But in stop & go traffic it was hard to be smooth and easy. Not at all like it was before I did the powder coating. So adjust my riding a bit to compensate and after a couple days I get the ABS light show. I forget the fault code number, but I found the plug near the front of the battery and made a LED tester to find it. Sure enough, sensor fault gap.
I shine a very bright light from behind and notice that the gap from ABS ring to sensor does look wider than I remember. So I take off the senor and pull out a .012" spacer. There was a stack of three or four in there. Put it back together, clear the fault code, and all is as it should be.
What you are describing sounds just like what I had.