Ironhead - Stock Wiring Schematic Drawings (created with reference to the OEM manual) 1959-1985 Sportster Main Wiring Diagrams The drawings below have been created using the factory schematic drawings from the FSMs as reference. They are available here but are not intended to replace the factory drawings.. The 1975 Sportster wiring diagram contains a bunch of components that differ from one model to the other, depending on how many horsepower the engine outputs. Most models of this bike feature two main parts, namely the starter circuit and the charging circuit.
Ignition/Tuner/ECM/Fuel Injection - 1975 Sportster WIRING DIAGRAM - I am trying to locate a wiring diagram for a 75 sportster. I personally have no clue about bikes, this is for my friend's dad. Any help would be greatly appreciated.. The physical elements of the 1975 Harley Davidson Sportster wiring diagram include all the wires, connectors, switches, and other components that are used to connect up the electrical system.