Posted on August 04 2017
Idiot Proof Wiring Diagrams for Big Twin 74's and Sportsters. Wiring your Harley Davidson Chopper/Bobber/Café Racer doesn't have to be high stress if you stick to the basics. These simplified diagrams I copied from and old Easyriders magazine shows how basic it can be. If you've been around for a while chances are you will remember seeing these many years ago.
- Below - Simplified wiring diagram for 74's with three brush generator :
2. Below - Simplified wiring diagram for 74's with two brush generator :
3. Below - Simplified wiring diagram for 74's with three brush generator :
4. Below - Simplified wiring diagram for 74s - 1970 and later Alternator
5. Below - Simplified wiring for 12 Volt electric start 74s and Sportsters
6. Below - Simplified wiring for 74s and Sportsters with Magneto, Bosch regulator and two brush generator
7. Simplified wiring for Sportsters and 74's with magneto, battery, bosch regulator and 2 brush generator.
8. Simplified wiring for Sportster and 74's with magneto and 6 volt two brush generator. (no battery)
9. Simplified wiring system for 74's with alternator, kick start and magneto.
All the best regards Tony