1957 Sportster

The Sportster XL was introduced as “a modern, up-to-date power plant.”

Number produced: 1983¹⁾

Original Price: $1103

• Displacement: 55 ci / 900 cc
• Compression: 7.5:1
• Hemi-spherical style heads
• Bore: 3 in^{^{²⁾⁾ )} )}
• Stroke: 3 13/16 in³⁾
• 90 Degree Valve Angle
• Horse Power: 40hp @ 5,500rpm^{^{⁴⁾⁾ )} )}
• Weigh: 495 lb / 225 kg^{^{⁵⁾⁾ )} )}
• Fuel capacity: 4.4 gal / 16.6 l^{^{⁶⁾⁾ )} )}
• MPG: 50mpg (est.)⁷⁾

• XL

• Pepper Red / Black Tank Panels^{^{⁸⁾⁾ )} )}
• Skyline Blue / Birch White Tank Panels^{^{⁹⁾⁾ )} )}
• Birch White / Black Tank Panels¹⁰⁾
• Black / Pepper Red Tank Panels¹¹⁾

1957 Parts Manual¹²⁾

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