i thought about that awhile ago back when i was into extremely light scooters, but heavier stuff feels better to ride and carbon fiber would flex and snap. and its not worth the money. it cost over 150 to make a pair.
if you really wanted to you could but itd only be worth it if you just made some thin aluminum bars and wrapped carbon fiber around it.
but even still you need to vaccuum(sp?) seal it then bake it and its just to much work for something thats gonna break easy anyway