Where on the frame of a harley Davidson sportster are serial numbers?

On a Harley-Davidson Sportster, the serial number can be found on the left front downtube of the frame. It is typically located near the steering head and is stamped into the metal. The serial number consists of 17 characters, including letters and numbers. The first three characters are the manufacturer code, which identifies Harley-Davidson. The next six characters are the model code, which identifies the specific Sportster model. The eighth character is a check digit, which is used to verify the accuracy of the serial number. The ninth character is the year code, which identifies the year the motorcycle was manufactured. The remaining eight characters are the sequential serial number.