MCN - Motorcycle News Posted February 10, 2009 Report Share Posted February 10, 2009 The 2009 Yamaha R1 is like no in-line-four cylinder sportsbike ever produced. It’s simply sensational. The Yamaha R1’s ultra-short-stroke engine has a cross-plane crankshaft, with its crank pins set at 90° and has irregular firing intervals, which is technology lifted directly...More... Quote Link to comment Share on other sites More sharing options...
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