| Wiring Diagrams - CT90-CT110 These are original and genuine Honda wiring diagrams, directly out of a Honda Shop Manual or a Honda Owner's Manual, so, no errors have been made by trying to redraw the wiring diagram accurately. 1970 CT90 Wiring Diagram (Covers 1970 - 1974, K2 - K5 & Early K6, 1975) 1970-1974 K2-K5 Early K6 CT90 Stock Wiring Diagram - Honda 1970-1974 K2-K5 Early K6 CT90 After Market ebay Harness Wiring Diagram Also..I bought an aftermarket wiring harness off of eaby (new) and it worked great. The new harness even had the wiring for winkers too. There were however a couple of differences in Honda Motorcycle Wiring Diagrams Honda CB450 CB 450 K7 Electrical Wiring Harness Diagram Schematic 1974 HERE. Honda CB450 SC Nighthawk CB 450 Electrical Wiring Diagram Schematic 1982 HERE. Honda CT90 CT 90 Trail Electrical Wiring Harness Diagram Schematic HERE. Honda CT110 CT 110 Trail Electrical Wiring Harness Diagram Schematic HERE.