MCN - Motorcycle News Posted September 8, 2009 Report Share Posted September 8, 2009 Yamaha has turned engine convention on its head by introducing a reverse cylinderhead design for the new YZF450 which is said to give the four-stroke the handling characteristics of a two-stroke. Find a Yamaha for sale Read Yamaha bike reviews...More... Quote Link to comment Share on other sites More sharing options...
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