That does look cool. I'm tempted to say that I would do it. But a good friend of mine (a former cop, and a fellow motorcyclist) would lecture me for hours if he heard that I was thinking of doing such a thing.
One of my motorcycles is a maxi-scooter, which as Dirk pointed out is a bit more practical for kilted riding than a conventional motorcycle. If used with "modesty closures" the rider might even be able to remain modest!
I also have a motorcycle with sidecar. Which would probably be the only way I would actually ride whilst kilted. (If you come-off whilst riding a sidecar rig, then things have already gone very very bad, so you are probably going to die anyway.)
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