Mechanical Voltage Regulator available in 6 Volt, and Bosch or Delco Style 12 Volt
Harley OE Part Num: 74510-47 is 6 Volt
Fits all 1952-56 K Model & 1957-64 XLH Sportsters
Harley OE Part Num: 74511-65 is 12 Volt Bosch Style
Fits: 1965-1978 XLCH Sportster
Harley OE Part Num: 74510-64B is 12 Volt Delco Style
Fits: 1967-1977 XLH Sportster
