Ok i gottcha i see what you mean p0ss3s3d. In the first set the ones you mentioned there was a tree in my way when i tracked the bikes, it would take my focus, so i ended up tracking after the tree and i wasn't fast enough every time to get a good shot. And number 2 i was panning him before that moment and just caught the wheelie. I need to work on keeping the camera more steady next time.
Ill try some more candids next time. And think more about the shot before shooting.