Legally here in Australia you are meant to wear helmets on pushbikes but a lot of people don't. The number of idiots I've seen with their helmet swinging from their handlebars while cycling is beyond count (and wearing it without it being done up under the chin) - having a helmet is no good to you unless it's securely on one's head. Eejits.
It's a bit of a blurry photograph of the original... But here's Galadrield on a motorbike (Royal Enfield for a Royal elf)
I rejigged and amended her The Hobbit White Council frock to make it more motorbike friendly, and gave her gloves, mithril jeans and kick-erse boots because PPE is always your friend people!
(My rational for no helmets is Dwarves head ARE helmets and elves just flip gracefully like cats and land on their feet no matter how they are flung about (unless there are urukhai involved - then it gets messier)).
Let’s just assume that Middle Earth Magic ™ is constantly affecting elven clothing so there is never any chance of an Isadora Duncan* occurring.
All that I've done so far are visible up on http://melanippos.tumblr.com
*Google it if you’re not aware of her fate - I imagine its always at the front of Edna Mode’s mind when she snaps “No capes darling! No capes!”