It is possible to ride while wearing a kilt. This is me on my old bike, an '81 GL1100 Gold Wing.
The Harley has hot parts in different locations than the Wing, so riding kilted requires a bit more care.
In any case, one tucks the front of the kilt (called the 'apron') under oneself and goes. The additional weight of a sporran helps to control the apron. Expect the rest to billow as the wind catches it. As long as one remains seated for the entire performance modesty should be maintained.
Mounting and dismounting while regimental requires some caution, as the act of throwing one's leg over the seat can give one more exposure than intended.
Vinyl seats left in the sun can lead to embarrassing burns, so consider covering the seat when not riding.
It goes without saying that practicing good hygiene is advised, however riding kilted almost guarantees no one who sees you will want to borrow your bike!
Riding kilted gives new meaning to 'getting your knees in the breeze'!
Don't forget to click the links in my earlier post to find out about (and donate to) Kilted To Kick Cancer!
I'm behind the curve on this, with the other participants in Kelly "Ambulance Driver" Grayson's "Kilted To Kick Cancer" fund raising challenge having put up their posts on September 1, but that's the way it goes.
KTKC is an campaign to call attention to two male-specific cancers: prostate cancer and testicular cancer. September is Prostate Cancer Awareness Month so for the month of September I'll be wearing one of my utility kilts whenever practical and using it as a conversation starter to talk about male specific cancers. Considering the burn on my right leg from a hot exhaust pipe I may have to reconsider whether riding the motorcycle while wearing a kilt is practical.