I'm guessing the first edition of the 1125 wasn't intended to go racing with, which would keep it from being competitive with Liter 4's and 1200 ducati's.
BTW Ducati solves one of the problems with twins with their desmotronic valve train. But they have to put expensive parts in the bottom end so it'll withstand 14,000 rpm. Which they don't really do for the street versions due to cost, and with the racing classes limiting engine to stock crankshafts they have a harder time getting the rpm (or life) out of the engine.
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