Engine & Performance for 2021 Harley-Davidson FLHXS Street Glide Special

Engine & Performance for the 2021 Harley-Davidson FLHXS Street Glide Special

The 2021 Harley-Davidson FLHXS Street Glide Special features Engine: Milwaukee-Eight 114 V-Twin, Displacement: 114 cu in (1,868 cc), Cooling: Air and Oil cooled, Fuel System: Electronic Sequential Port Fuel Injection (ESPFI). This trim includes Engine Guard — New low-profile engine guard designed to emphasize the bike's slammed look.. Owner note: High-compression 114 engine and extensive electronics put high demand on the battery; typical lifespan is 3-4 years. Known concern: Engine Sumping — Check for excessive oil in the air cleaner as a symptom.. Learn more about this ride →