working on it a little more ill add a glow to the lights on the front of the bike, also still want to fix the front bumper a little more. im going to add mud but im going to try to make it stand out instead of having it on my diffuse. i might normal map it in.
For what I'm guessing is a muddy variation on the far right, you want to give the muddy sections an additional normalmap overlay and their own specular properties. For now it looks more like a Diffuse job which in turn looks like a brown airbrush paintjob. Keep at it man, you've improved by a large margin ;)