Chopper Wiring Harness: Electrical Components | eBay Find great deals on eBay for Chopper Wiring Harness in Electrical Components. Shop with confidence. Find great deals on eBay for Chopper Wiring Harness in Electrical Components. Ultima Simple Wiring Module. Ultima Simple Wiring Module. This simple wiring module was designed to help simplify wiring when only the bare necessities are needed Simplified Motorcycle Wiring Harness | MotorcycleZombies Materials Needed to Build a Simplified Wiring Harness. Before you build a simple wiring harness for your motorcycle, you’ll need: Enough new wire – 16 to 20 gauge stranded copper wire. New bullet (single, double, and triple) and fuse connectors – remember to grab male and female. Battery. Battery ground wire (4 to 6 gauge).