Chrome wheeled, fuel injected and steppin out over the line
Cleverly phrasing it as if his motorcycle, the means for his freedom and life are aspects of himself.
The first fuel-injected motorcycle available to the general public was the Honda CX500TURBO, which was introduced in 1982 — several years after this song was written. So “fuel-injected” here can’t apply to a motorcycle (unless Springsteen was essentially clueless about motorcycle engines, which is certainly possible).
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