1. Honda Manuals: The Honda website offers a variety of manuals and diagrams for their motorcycles. You can find the wiring diagram for the Honda C90 by visiting the Honda Manuals website and selecting the "C90" model from the list of motorcycles.
2. Haynes Manuals: Haynes Manuals is a well-known publisher of automotive repair manuals. They offer a variety of manuals for motorcycles, including the Honda C90. You can find the wiring diagram for the Honda C90 in the Haynes Manual for the C90.
3. Clymer Manuals: Clymer Manuals is another publisher of automotive repair manuals. They offer a variety of manuals for motorcycles, including the Honda C90. You can find the wiring diagram for the Honda C90 in the Clymer Manual for the C90.
4. Online Forums: There are several online forums dedicated to Honda motorcycles. These forums often contain a wealth of information, including wiring diagrams. You can try searching for "Honda C90 wiring diagram" on these forums to see if you can find a copy of the diagram.
