YFZ 450 Wiring Harness | eBay This is a 2004-2005 Yamaha YFZ450 Complete factory OEM wiring harness. Ready to install on a 2004 or 2005 YFZ450, 04 or 05 YFZ 450. Many Yamaha Banshee and YFZ450 parts are yfz 450 wiring harness | eBay Find great deals on eBay for yfz 450 wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword New 2007 2008 Yamaha Yfz450 Complete Factory Oem Wiring Harness Loom And Plugs. Brand New. 5.0 out of 5 stars.