Look carefully at the front wheel and forks. The forks are turned to almost 30 degrees right. From the width of that silly cylinder on the front, the front wheel would intersect it. Not possible in a physical model. Each piece of the bike is a real part, photographed separately or in a bunch like the exhaust And it could even add the MISSING reflections in the headlight holder tubes and fender. Another problem area, look at the amount of light on the lower exhaust pipes, compare it with the lighting on the other bits in the area. Lighting is hard to get right in doctored photos, this thing has problems in that area. Clear, distinct shadow under the bike and on the rider shows light from in front and above.

Website: http://users.hunterlink.net.au/~ddped/joebody.html