I love a good concept bike. Not so much the comments they usually provoke. If you spotted the lack of clearance, the square tyres and lack of indicators and tail light then you're missing the point.
"The concept - "Metalback" is powered by a v4 engine running on bio diesel. This increases the range and MPG well above conventional gasoline bikes while running on a fuel which is more environmentally-friendly. Its frame and skin are crafted from recycled aluminum. This has the advantage of saving weight to enhance performance while reclaiming pre-used material. In the manufacturing process, the alloy is treated to patina and age naturally without expensive and harmful paint applications. The net effect is a raw natural surface which suits the classic cafe racer and recalls the romance and power of vintage WW2 fighter planes." - James Meadows Design