Comments on my bicycle drawering?

Question

http://www.flickr.com/photos/68866020@N00/438014259/

I drew this when I stopped @ a park while bicycling. I used a pen from my backpack & a flyer from a house that was on sale (thus the stuff u can barley c on the picture's other side.

Answer 1

really nice. Increase the contrast. IT looks good.

Answer 2

now that i know what your bike looks like, i can steal it.

Answer 3

intense man but you could emphasize it and add shadow

Answer 4

it looks really amazing you should shade colors in the bike with colored pencils