The Yamaha XJR1300's DOHC air-cooled motor started its life pushing around the sporty-touring type thing that was the 1984 FJ1100. Over two decades later it’s still making bags of thrust, still runs nice and smoothly and still posts a 0-60 time that’s effortlessly faster than a Porsche Turbo. Not bad, eh? For 2007 it finally gained Euro 3 satisfying fuel injection plus a catalyser exhaust without any noticeable change in performance.