Harley-Davidson® exploded-view technical drawing of the ALTERNATOR & REGULATOR assembly together with a numbered parts list from the 2003 Sportster Models Parts Catalog. Quantities shown are the quantities required for each part used on the assembly. Adjust the quantity if you require more or less and then add directly to your shopping cart. Click the part image for and enlarged view. Click on the part number to visit the product page. To view another assembly from the 2003 Sportster Models Parts Catalog select from the dropdown list.