bore
The bore is how wide the engine’s cylinders are. Making them wider lets the engine take in more air and fuel, which can make it stronger.
The bore is the diameter of an engine's cylinder; increasing it enlarges the engine’s displacement and can boost power.
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"...Oh, bore, that's right. And so, if you wanted displacement..."
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"...the hot weather has made the bore. That is the cylinder in which the piston moves bigger in diameter."
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