SUPER73 Star Union 300X Replacement Thumb Throttle (48V)

Genuine OEM Direct Replacement

If your bike is experiencing sticky engagement, intermittent power loss, or physical damage from an accidental tip-over, the official SUPER73 Star Union 300X Thumb Throttle is the direct factory solution. Engineered specifically for SUPER73’s 48-volt electrical architecture, this original equipment manufacturer (OEM) part completely restores crisp, predictable acceleration right out of the box without requiring wiring hacks or controller reprogramming.

Ergonomic and Versatile Cockpit Layout

Designed for minimalist utility, the Star Union 300X features a compact, low-profile linear thumb lever that tucks neatly against your handlebar grips. This keeps your cockpit clean and prevents interference with brake levers or accessory mounts. Its versatile design allows it to be flipped and mounted securely on either the left or right side of your handlebars, adapting perfectly to your personal riding style and ergonomics.

Rugged Performance and Simple Installation

Built to endure daily commuting, beach paths, and weather exposure, this 48V throttle utilizes durable, weather-sealed casing to protect its internal hall-effect sensor from dust and moisture. Installation is straightforward: simply slide it onto your standard 22mm handlebars, secure the mounting hardware, and connect the Higo-style quick-disconnect plug into your main wiring harness.

PART 2: SPECIFICATIONS & PERFORMANCE BREAKDOWN

• Retail Price: $20.00

• Manufacturer: Star Union

• Model Number: 300X Series

• Operating Voltage: 48V (Optimized for SUPER73 48V controller systems)

• Sensor Type: Linear Hall-Effect (provides fluid, progressive power delivery)

• Mounting Location: Ambidextrous (Can be mounted on the left or right side)

• Handlebar Diameter: Standard 22mm (7/8″) fitment

📦 What’s Included in the Box

• 1x Star Union 300X Thumb Throttle with integrated wiring lead

• Integrated metal clamping collar and tightening hardware

🚲 Vehicle Compatibility Matrix

🛠️ Installation Guide:

Before replacing your throttle, ensure your bike is completely powered down and the battery is removed. Carefully route the new wire along the frame following your original cable paths, ensuring there is enough slack at the handlebars to turn fully to the left and right without binding or pulling the connector loose.