BMW S1000RR vs BMW S1000RR HP4
 

A few months ago I was lucky enough to ride the new BMW HP4 at its world launch at Jerez, southern Spain. With perfect track conditions and slick tyres to play on, it was a dream. More impressive still was the HP4. BMW has taken its already class-leading S1000RR and made it even better: 9kg lighter, more agile, smoother and ...

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