Motorcycle Wires & Electrical Cabling for Honda CB750 for Get the best deal for Motorcycle Wires & Electrical Cabling for Honda CB750 from the largest online selection at eBay. Browse your favorite brands affordable prices free shipping on many items. Wiring Harness - Electrical - Products - Vintage CB750 Main Wire Harness Loom - OEM # 32100-300-050 Fits: Honda CB750K (1969-71) NOTE: These fit model years listed. Other years of CB750 use a different OEM part number (there is a difference!).