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Right, but that still doesn't describe any difference between an inline twin and a parallel twin; those are two names for the same thing as far as I can tell.
In terms of orienting them transverse or longitudinally, it's a possibility, but unlikely for a chain-driven sportbike. A transverse engine has the countershaft sprocket aligned the correct way for a chain to run to the rear of the bike; an engine oriented front to back (like a gold wing, boxer engine, guzzi, etc.) only makes more sense when you're attaching it to the rear with a shaft drive, or are not concerned about high levels of efficiency / power transfer. Every time the power has to turn 90 degrees there's an unavoidable loss.
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