Beautiful work so far. I love it and only have a few crits right now. Firstly, all of the lights look pasted on a little bit. Push those highlights more overall on your texture map. It's looking a little bland right now. You also should cleanup the "Police" Sign on the back of the bike, the P and O still have some white…
Saso has a point; sometimes real life isn't the best in terms of design, and it can be a good idea to improve it yourself. My advice would be to push material definitons a bit more. Clearly discern the different metals and finishes fron each other by using some more painted highlights in your diffuse and by putting some…