Motion Pro Throttle By Wire Extension Upgrade or extend your Harley-Davidson throttle system with the Motion Pro Throttle By Wire Extension. Designed for HD models using Throttle By Wire, this precision-built harness simplifies bar swaps, custom builds, and repairs—no cutting, soldering, or crimping required. Key Features Direct-fit replacement: Compatible with Harley-Davidson Throttle By Wire systems for seamless integration. Install-friendly design: Lower connector body is intentionally not installed to make routing through handlebars fast and clean. No tools needed: Pre-terminated wires—just route, plug into the connector, and ride. Optimal length: 46-inch harness supports taller bars and custom setups. Clean finish: Excess length can be concealed inside the handlebar or behind body panels. Why Choose Motion Pro Motion Pro is trusted by pros and enthusiasts for reliable motorcycle components that deliver durability, ease of installation, and OEM-level performance. This extension ensures smooth throttle response and a factory-clean look on your custom build. Ideal For Handlebar upgrades (taller or wider bars) Custom builds and restorations Replacing damaged throttle-by-wire harnesses Get the flexibility and clean routing you need with the Motion Pro Throttle By Wire Extension—built for performance and a flawless finish.