there's really no motion blur that's visible...it's visible, but only slightly, so it really isn't for this challenge. The shot is sharp and all, but looks static
The high shutter speed has frozen the bike (witness the spokes), but there is still enough motion to blur the image. Needs more motion for the challenge, or a higher shutter speed to capture the image.
you've met the challenge, but i think your flash has over-powered your subject, creating a rather ugly contrast between the yellow and browns. unless you're a fan of the sport, this probably isn't that pleasant to look at.
no sence of speed here, the spokes are all pin sharp, almost as if the bike is stationary, and the background is to dark to tell, also looks like a flash was used
Motion Blur here is defeated by the use of flash and the murkiness of the background. The exposure time is long enough to create the effect, however the subject appears camera shook.
Great job however the background is too dark to get the full effect. Too bad because I can see hints of some really interesting colors that would make this shot POP! 6