The "XL" in Harley Sportster XL refers to the model series within the Sportster lineup produced by Harley-Davidson. In Harley-Davidson's naming convention, the "XL" designation has been used to identify the Sportster models since their introduction in 1957.
The Sportster XL models are known for their smaller size and lighter weight compared to other Harley-Davidson motorcycles. They are designed for riders who prefer a more nimble and agile motorcycle, making them popular for urban riding and for riders with smaller physiques. The Sportster XL models often feature a V-twin engine, typically ranging from 883cc to 1200cc, and have a distinctive style that has become iconic within the Harley-Davidson brand.