I am told the 1.5L civics did not have these balancers in the crank pulley. The 1.6L does. Something about harmonics, vibrations, and the size of the engine. But I am not well-informed on it. Sorry I'm not more helpful. Maybe someone else has a better answer.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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