MCN - Motorcycle News Posted February 18, 2010 Report Share Posted February 18, 2010 This video of a BMW S1000RR125cc engine revving to 14,200rpm with the valves operating has just surfaced after being released by BMW USA. The video shows the valves, rocker arms and springs operating from idle through to the maximum revs...More... Quote Link to comment Share on other sites More sharing options...
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