Tools & Chemicals for Metric Motorcycle Builds. The Metric Tools & Chemicals collection at TC Bros is built for riders and builders who demand precision and reliability when working on their custom motorcycles. This category includes a wide range of essential tools, lubricants, cleaners, and maintenance products tailored for iconic metric models like Yamaha XS650, Honda CB750, and other classics. Whether you’re wrenching on a full chopper build or performing routine maintenance, these products are designed to keep your bike running smoothly and looking sharp. With TC Bros’ reputation for quality and a rebellious commitment to the craft, this collection provides everything you need to maintain, upgrade, or transform your ride with confidence.