I've struggled to find a camera setup that allows to handlebar mount without suffering from camera bumping and whatnot. I have a Koadk Playsport that I attach to the bars with a JOBY GorillaPod and the results are ok, but not great. The image stabilization of the Kodak works pretty well (best on 720p @ 60fps), but not as good as I would like. I realize this is a complete impossibility, but check this out... would cure our qualms:
http://gizmodo.com/#!5098255/hackmod...era-stabilizer