Have to agree with MLeek here; these are definitely lacking. First, the basics: Your background; I'm sure that you could have found somewhere that didn't have chain-link fencing and part of a building in the background. Exposure: Definitely under-exposed; nothing withstanding that you were going for a "dark" look, these are just under-exposed.
What you needed here was an off-camera light which would have allowed you to increase the exposure on the motorcycle RELATIVE to the sky. The sky isn't blown out, but it is rather watery and boring. A single speedlight in a medium soft-box would have made a world of difference!
While the 'down low' shooting position works for sports cars, I'm not sure it works here. I would suggest you would have been better off moving more to your right and elevating the camera so that the lens axis was around the centre of the headlight.
The second image has a lot of potential, but I'd like to see the whole of the right-side gauge in the image, even though it's very softly focused, I think that would help.
The last image does nothing for me; in fact if I didn't know better I would think you'd put your camera down on the ground and accidentally tripped the shutter. Dont' forget to keep your camera level when shooting - in #1 it's on a significant lean!
Just my $00.02 worth - your mileage may vary.
~John