I like your very different style here. It all blends in a bit too much with all the same colours throughout but your original type of framing is great.
the bottom left pic is a little distracting, i mean to also make out what it is, at first. maybe should have used another piece of the bike..otherwise it's pretty cool.
Some neat angles of the pipes. It took me a minute (or two) to figure it out. With out the title IMHO you'll lose some of the voters because they can't tell what your image is or won't take the time to figure it out. I'd prefer another wider shot of the actually bike.