In general, I'm a proponent of ABS on street bikes, but there are several reported instances of ABS kicking in and providing essentially no stopping power when braking over a series of stutter bumps. The theory is that the wheel would lock as it unloaded entering the divot causing ABS to release the brakes just as the wheel reloads hitting the next hump (where the traction would have been maximized), reactivate then easily lock again entering the next divot, etc. resulting in essentially no braking force throughout the series of ripples. These ripples in the road are more likely to occur near an intersection as that's where the pavement takes the most braking and acceleration abuse, resulting in some surprising non-braking events as you try to stop for the light. A non-ABS bike would not suffer this problem. The situations appear rare, but there are enough reported incidents on a variety of ABS bikes to at least make it credible. Every incident I've read appeared to be on an older and/or cheaper bike. I believe most newer ABS systems cycle much faster, thus avoiding the issue, although some of the cheaper bikes on the market may continue using the older ABS systems to keep costs down.
I still think the advantages of ABS on street bikes outweigh the negatives.
