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Remember the six-cylinder Kawasaki KZ1300 from the late-1970s? The brutish, 120 horsepower motorcycle weighed an almighty 322kg, did the quarter mile in 11.96 seconds, and was capable of hitting a top speed of 225km/h. Enough for you? It wasnt, for Allen Millyard, a nuclear research engineer by profession. So what did Mr Millyard do? Why, he built his own bike of course a 12-cylinder Kawasaki KZ2300. While his hand-built machine looks stock, its actually considerably bigger and the V12 engine is comprised of two complete KZ1300 cylinder blocks.