What Does The 48 Mean On The Harley-Davidson Sportster Forty-Eight?

The long-running Harley-Davidson Sportster lineup included the Sportster Forty-Eight, which was discontinued after 2022. What does Forty-Eight mean on a Harley?

Source: https://www.slashgear.com/1820457/harley-davidson-sportster-forty-eight-meaning/

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