The ST4s' 996cc V-twin, essentially unchanged from last year, produces 117 horsepower and 72 foot-pounds of torque (both claimed). This ferocious, quick-revving motor is an adrenaline factory on fast, open roads, pulling with authority well into double-digit revs. As fun as it is at speed, however, a slight off-idle stumble and general low-rev snatchiness (a common Desmoquattro complaint) make it less than ideal for stop-and-go duty. Suspension, on the other hand, is faultless. Pairing a fully adjustable, inverted 43mm Showa fork with titanium-nitrided sliders and a similarly adjustable Oehlins rear shock, suspension is suitably taut for the hyper speeds that the eight-valver encourages, and offers excellent absorption of both high- and low-speed bumps. Everything as you'd expect on a bike with a price tag north of $15,000.