Main Wiring Harness - 32100-377-030 - Honda CB400F Reproduction main wiring harness for the Honda CB400F Super Sport. Tired of tracking down electrical gremlins due to old broken wires or corroded connections? cb400f wiring | eBay Find great deals on eBay for cb400f wiring. Shop with confidence. Skip to main content. eBay Logo: 1975 Honda CB400F Super Sport MAIN ENGINE WIRING HARNESS MOTOR WIRE LOOM (Fits: CB400F) Pre-Owned. $110. Honda complete wire wiring harness loom CB400F 1975 1976 1977 OEMH22027 HN See more like this.