BMW's standard S 1000 RR is a mean 193-horsepower track animal, but its souped-up limited-edition version, the new HP4, introduces the world's first self-adjusting, semi-active suspension system, adding serious brains to the bike's brawn. For riders confused by preload, rebound, and compression settings, BMW lifts the guesswork by automatically adjusting the suspension up to 100 times per second via electromagnetic valves within the shocks. The result is surprising smoothness and stiffness when you need it – kind of like having your own personal suspension tuner adjusting your bike, midcorner. [$20,525;]

Spec Check
Engine: 999cc, water/ oil-cooled inline-4
Horsepower: 193

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