German bi-fuel motorbike run on natural gas or gasoline

A group of engineers from the University of Bayreuth, Germany, are about to begin tests of a prototype bi-fuel motorcycle. Already tested on gasoline, the motorcycle is about to start being tested using natural gas, with fuel stored in canisters following the contours of the bike's exhaust system. The prototype can store enough compressed natural gas (CNG) on board for around 80-100 km (about 60 miles) of driving with gasoline extending the range to 400 km (240 mi).
The bike, which has a 1.2 liter engine good for 130 HP, was designed by Andreas Dürnhöfer, Reinhard Hackenschmidt und Frank Rieg (in the picture).

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[Source: Erdgasfahrzeuge]