Any idea that the GT is in the slightest way sensible dissolves the first time you twist the throttle on the 1,301cc, 75-degree V-twin. Gifted with claimed 173 hp and 106 lb.-ft. of torque at the crank, the smooth-yet-scintillating engine gives the GT outrageous, crazy-easy speed. Modifications to bring the engine into Euro 4 compliance resulted in combustion-chamber tweaks and the addition of an exhaust-system valve, and helped move the torque peak down the range by 1,000 rpm, now at 6,750 rpm. Yet the engine retains its free-revving, thrust-at-all-speeds character. Truly, this engine defies easy description and collects hyperbole the way a librarian hoards books. Smooth and collected at low rpm, and emphatically easy to modulate thanks to spot-on ride-by-wire programming, the GT’s engine begins pulling hard by 3,000 rpm, where it taunts the Bosch traction control to keep the 190/55-17 Pirelli fat with traction.