The first and last photo are very noisy. I noticed that you shot the first one (which to me, seems more grainy then the last) at 1/2000. Please excuse me, as I don't know how quickly the cyclists were moving or just how little light was available, but I am willing to bet that you could have traded at least 1/1000 in shutter speed for an ISO of around 400 while keeping your aperture the same. Artistically speaking, I like the photo in the middle. I only have two small complaints with this photo, one of which is/was completely out of your control. I would have tried to move in a bit closer, as to cut out some of the tarmac in the fore ground. A bit of this is nice in my opinion, because it provides for "stage" so to speak, and draws the viewers eyes in nicely. Secondly, the woman standing in front of the shop window keeps drawing my attention away from everything else. This is probably just my fault though.
On the other two photos, I am inclined to think that the photos would be better (visually) if there was a clearer, more prominent center of interest. For instance, from about 2.5 inches above the helmet to the elbows (or knees), or even to the bottom of the handle bars.
All in all, I dont think its bad at all for photos taken under the circumstances you described. My favorite is definitely the photo in the middle.