MCN - Motorcycle News Posted September 17, 2012 Report Share Posted September 17, 2012 BMW's new HP4 is the first production motorcycle to feature semi-active suspension - its damping constantly changes as you ride. It's also a massive 9kg lighter than an equivalent S1000RR and has an even more refined traction control system, which can...More... Quote Link to comment Share on other sites More sharing options...
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