Nice series so far, looks like a nice day out as well. As for CC here goes:
#1
Background is a bit too busy (ice cream van, gas tank, tree, fencing) which all distracts from the subject. There's no real sense of motion on this one either (e.g. wheel blur, mud getting kicked up etc.)
#2
Exposure is good, the pose is good, the shadows cast don't inhibit the image, your shutter speed has captured the motion of the front wheel well
The fence is a major distraction though, the guy's gloves look a little soft, as does the helmet area - could maybe do with a very subtle boost to the sharpening
#3
Cracking frame, the sky looks a tad blown out but am sure some PP work could help you out here. The antenna and heads in the bottom right should be removed. The chap in the lower left gives the scene a sense of scale and height.