I certainly wouldn't ride in one, but I suppose that there would be scope for someone to do so with 'chaps'. You could go for a pair of Motorman breeches with the kilt on the outside. And, I've never done so, but you could wear the kilt under a touring suit (like my Olympian Phantom (http://www.olympiamotosports.com/phantom/phantom.htm) if you just wanted to get somewhere in your kilt and not have to change.

Graham.