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SB-Series Engines


Additional Features and Benefits

  • “Square” motor configuration (equal bore and stroke) produces excellent torque and greatly increases engine life
  • S&S billet gear cover kit and billet aluminum rocker covers
  • Compatible with 1991-2003 5-speed transmission components
  • Includes oil pump and oil filter mount
  • Natural finish
  • One year parts only warranty
  • Prices Starting at $8,995.00

S&S® Complete SB 100 Engines for Sportster® and Buell® Models

Application Part No
SB100 for Sportster 31-9891
SB100 for Buell 31-9893

The Dynojet® 250i chassis dynamometer shows that the S&S SB100 engine for Harley- Davidson® Sportster® models, cranks out a massive 111.2 horsepower and 107.2 ft-lb of torque. If the SB100 replaces an 883cc engine, you’ll be bolting in 64.4 (137.6%) more horsepower and 59.4 ft-lb (122.9%) more torque. In a light bike like a Sportster, that results in a serious performance increase. Even a stock 1200cc engine or a 1200cc conversion can’t compare with this kind of power.

S&S® SB-Series Engine Specifications

Engine Displacement Bore Stroke Cam Piston Type Compression Ratio
SB100 100" 4" 4" 600 S&S forged 10.3:1