Speed Master Ultra4: Boost Your Xiaomi 4 Performance

Are you ready to take your Xiaomi 4 Ultra electric scooter to the next level? The Edison Evo Tuning Kit promises enhanced performance, greater speed, and a truly custom riding experience. In this guide, we’ll walk you through the full installation process based on a hands-on tutorial — from disassembling the scooter to configuring the new controller. Whether you're a DIY enthusiast or an e-scooter power user, this mod is for you.

🔧 What’s Inside the Edison Evo Tuning Kit?

The kit comes with:

  • A high-performance controller
  • A new dashboard unit
  • Signal board for blinkers
  • Bridges for wiring adjustments
  • Adhesive pad, screws, and necessary wiring

🧰 Tools You'll Need

  • 2.5mm and 3mm Allen keys
  • Screwdriver (long, flat head preferred)
  • TX10 screwdriver bit or electric screwdriver
  • A long wire or string for feeding cables through the handlebar

🛠️ Step-by-Step Installation Guide

1. Dismantle the Handlebar and Dashboard

Begin by removing the brake cable and handlebar screws. Gently take off the front light and the existing dashboard, noting the original wire routing. Remove any foam filling inside the steering tube.

2. Prepare the New Dashboard

Feed the new wiring through the handlebar. Plug in the connectors — don’t worry, they are uniquely shaped to prevent mismatching. Attach the new dashboard using only the upper screws to avoid pressure on the solder joints.

3. Access the Main Controller

Turn the scooter upside down and remove the bottom panel. Disconnect the original controller from the battery and motor. Carefully pull the old cable out of the steering column.

4. Install the New Controller

Use a string to help guide the new cable back through the handlebar. Mount the new controller inside the deck with the adhesive pad. Reconnect all wiring, including motor, battery, and dashboard cables.

5. Bridging the Correct Cables

Use the correct bridge (the one that connects green and white wires — not the green/yellow combo). This step is crucial for proper battery communication.

6. Finalize Assembly

Secure the controller cover with screws. Reinstall the handlebar, push excess cable back into the frame, and plug in the final connectors.

⚙️ Initial Configuration and Testing

  1. Power calibration: Hold the power button for 10 seconds — the motor will rotate forward and backward, signaling completion with a beep.
  2. App pairing: Connect via Bluetooth and adjust settings like:

🚀 Performance Result: With a rider weight of 85kg, the scooter reaches 30–40 km/h, making it a true upgrade from stock.

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