I remember a number of years ago, perhaps in the late 90's and early 2000's, some sport bike manufacturers, including Ducati IIRC, were using the "radial" top mounted steering dampers like you still see sold by Ohlins and Scotts for dirt bikes. To the best of my knowledge, I have not seen one of those on a sport or street bike for quite some time and neither company seems to offer them today even as an aftermarket piece for anything other than MX or enduro bikes. Is that something that just didn't work on street or track bikes and if so, why?