Ignition & Electrical Components for Metric Motorcycles. The Metric Ignition & Electrical collection at TC Bros is designed for riders and builders who demand dependable performance and the freedom to customize every detail of their ride. This category features premium components like ignition switches, coils, wiring harnesses, and regulator kits, all built for durability, reliability, and easy integration with custom builds. Perfect for iconic models like Yamaha XS650, Honda CB750, and other metric classics, these parts deliver the spark and power needed to keep your bike running strong. With TC Bros’ focus on quality and a rebellious commitment to design, this collection empowers you to create a machine that’s as reliable as it is bold.