Work?
It works the same as a wet clutch, but doesn't run in oil which robs the bike of power. It also means you can replace the clutch without draining off the engine oil (tranny oil on a two stroke), and the oil doesn't get contaminated with clutch friction materiel.
Of course, the real reason on a roadbike is that it sounds awesome!
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball