What were they thinking?The Guinness Book of World Records has verified this huge motorcycle as the world's heaviest. This specific monster was constructed in Zilly, Germany by Harzer Bike Schmiede, and named, "Led Zeppelin". It weighs approximately 4 1/2 tons, and the engine out of an old Russian tank weighs 1.8 tons by itself.




Gunbus 410 Cubic Inch V-Twin Motorcycle
Made by a company Leonhardt Manufacturing, called because of its founder Clemens Leonhardt, the GUNBUS 410 is a real monster. It is powered by the fuel injected, 45 degree 6728 cc / 410 cubic inch V-Twin engine and operates by using a three speed gear box with reverse.






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