MCN - Motorcycle News Posted January 28, 2009 Report Share Posted January 28, 2009 Yamaha’s latest R1 features new-found midrange drive from junking Yamaha’s tried and tested five-valve per cylinder in favour of the traditional four-valve set up, but at the same time installing some of the “bad boy” engine manners the original model...More... Quote Link to comment Share on other sites More sharing options...
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