An article in Bikepoint about Deus Ex Machina's SR400 TT: http://bikepoint.com.au/portal/tabID__5760/ArticleID__120764/DesktopDefault.aspx NB the short comment on singles at the end, which is the best bit: "The quintessential motorcycling experience is already happening as you fire up a four-stroke single. With a physical linkage between your foot and the piston, you can feel the inertia of the crank and then the meaty four-stroke compression, as you bring it up to top-dead-centre. Ease it over compression and then go for the big prod. It's special every time you hear it fire then bark into life. And you know you did it. You're feeling good even before you slip it into gear. Then, as you ride, you hear the thing breathing in through its carby and exhaling the hot exhaust gases. There's the smell of the fuel that's being converted to motion and heat. And you can hear the quality of the firing impulses - you can even feel them. When you punch it up to the next gear you can hear the note change as it takes up the extra load - not the drop in revs; it's the deepening of the tone. A single really talks to you personally, in subtle ways. Multi-cylinders just chatter away amongst themselves, indifferent to your presence."