I hesitate to say how fast I was going in a very hard rain with two other bikes. But I was surprised that handling was quite good. It was strictly vertical straight line motion on a country road, with no cross wind and no turns. But very hard rain accumulating on the roadway. I will consider that a somewhat safe upper limit, because I'm pretty sure I'll never go faster than that in the rain. And perhaps the only reason I did it that day, is because the two bikes in front of me didn't fall down either. On the other hand, I've had friends say their bikes felt really odd and unstable in the rain on the freeway at 65mph, and slowed down. And no, I don't think 190+mph is possible in the rain. Forward vision, if nothing else, would be nearly non-existent.