A modest 11.5:1
compression ratio suggests “tuning for torque,” as does the omission of a
horsepower spec for the U.S. models. (Yamaha Italy released information
on the MT-09 before the American embargo expired, including a power
rating of 115 CV, which converts to 113.4 bhp.) For us, Yamaha says only
that the engine makes 65 lb.-ft. of torque at an unspecified speed. A
cutaway on display at the press event reveals few groundbreaking
technologies, just a compact, modern motorcycle engine with ride-by-wire
electronics and three ride modes (but no TC). Yamaha has a new set of
switch clusters for the FZ-09, and a pushbutton labeled Mode presumably
switches among the three drive modes. In order to bolster midrange
torque, Yamaha’s engineers fitted staggered-length intake trumpets
inside the airbox. (They’re listed as “variable length” in the press
materials, but they are of fixed dimension.) A single gear-driven
counterbalancer resides just ahead of the crankshaft line, an important
component to reduce vibration in a 120-degree triple.

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