This is a great shot of a motorcycle. I like the angle and framing, and feel the overall post-processing was done very well. I agree with the comment from Pedro about the difficulty getting the chrome looking good without blowing out all its highlights.
I think the image may have suffered in the challenge because of a few factors that take away from what is essentially a great shot.
1. Focus seems sharp, but maybe a little camera shake at 1/25? I probably would have played with the ISO and/or aperture to get the shutter speed up higher.
2. The crop seems a little tight. If you could have made this a wider shot, that would have given a stronger feeling of the bike being the centered subject. As it is now, it looks like maybe the engine of the bike is the center, not the whole bike.
3. Your comments indicate that you cloned out some distractions. I agree with the comment from doctornick - you could have gone further, cloning out the streaks and dots in the black background, maybe even cloning out the sign behind the fork and headlight.
a very nice, impactful shot but the background is much too dark, it takes away definition by blending with the black parts of the subject (tires and seat)
NIce but the streaks on the top left and bottom left are distracting. This being an advanced editing rule challange, removing the streaks is allowed. Nice capture otherwise. I like how you made the background black to bring out the bike.