As the Crankshaft Turns

Dear MOby,

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Ask MO Anything: Why A 270-Degree Crank In A Bonneville?

This is an unusual Ask MO Anything, as this question was delivered not by a reader but by me. During the presentation for the T100 Bonneville I rode last week, I asked why Triumph chose a 270-degree crank for its new Bonneville parallel-Twins rather than the 360-degree orientation of Triumph’s originals. Miles Perkins, Triumph’s Head Of Brand, attempted to give me a satisfactory answer but admitted I’d be better served by a response from one of Triumph’s powertrain specialists.

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