I've seen comments before where people say that the shot is cropped too tight. With this shot that is the first thing that pops into my head. You have reasonably nice lighting and the focus is good, but the composition doesn't look 'right'.
TC
Interesting subject. Range of lights and darks is good. Shadow from flash makes this less than perfect. Didn't mark you down for the title, but it seems a little inappropriate for a well greased machine...
Gives you feeling of something rocksolid and though I usually dont like thick borders I think it suits the subject on this image. But this image seems litle underexposed. Othervise, very good.