Bafang G320 BBSHD Mid Drive Motor Conversion Kit User Manual

1. Product Overview

The Bafang G320 BBSHD Mid Drive Motor Conversion Kit is designed to transform a standard bicycle into a powerful electric bike. Featuring an integrated Pedal Assist System (PAS), this mid-drive motor delivers a rated power of 1000W, a reduction ratio of 1:21.9, and a maximum torque of 160 N.m. This provides significant explosive force upon activation, enhancing riding enjoyment and making it suitable for various terrains, including mountain bikes and sand bikes, as well as transport bikes.

Important Note on Voltage: Both 48V 1000W and 52V 1000W versions are marked as '48V 1000W' on the motor itself. The distinction lies in the controller. Ensure you select the correct version (48V or 52V) to match your battery's rated voltage for proper operation.

Package Contents:

• BBSHD 48V/52V 1000W Mid-Drive Motor: 1 pc
• LCD Display + Operation Button: 1 pc
• Brake Levers (or Brake Sensors, depending on selection): 2 pcs
• Thumb Throttle: 1 pc
• Waterproof Quick Release Wires (1T4 Cable): 1 pc
• Speed Detecting Sensor + Magnet: 1 pc
• Chain Wheel: 1 pc
• Left Crank + Right Crank: 1 set
• Fixing Plate: 1 pc
• M5*10 Nuts: 5 pcs
• M6*12 Nuts: 2 pcs
• M33 Nuts: 2 pcs
• ST 3.9 Nuts: 5 pcs

2. Setup and Installation

2.1 Compatibility Check

Before installation, ensure your bicycle's bottom bracket (BB) is compatible with the motor kit. Measure the width of your bottom bracket and its inner diameter.

2.2 Motor Assembly

The mid-drive motor is installed in place of your bike's bottom bracket. Follow the exploded view diagram for correct assembly of the motor, chainring, cranks, and securing components.

2.3 Wiring Diagram

Carefully connect all components according to the wiring diagram. Ensure all connections are secure and waterproof where applicable.

2.4 Component Installation Example

Refer to the example image for typical placement of accessories on a bicycle.

2.5 Visualizing the Transformation

3. Operating Instructions

3.1 Display Models

The kit includes an LCD display for monitoring speed, battery level, assist level, and other parameters. Various display models are compatible, each with unique features.

3.2 Display Specifications

Refer to the table below for detailed specifications of various display models:

3.3 Basic Operation

1. Power On/Off: Press and hold the power button on the display to turn the system on or off.
2. Pedal Assist System (PAS): The motor provides assistance as you pedal. Use the display controls to adjust the level of pedal assistance (typically 0-5 or 0-9 levels).
3. Throttle: The thumb throttle provides power on demand, allowing you to accelerate without pedaling. Use it carefully, especially at higher assist levels.
4. Monitoring: The display shows real-time information such as current speed, battery charge level, trip distance, and assist level.

4. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Bafang mid-drive motor kit.

• Cleaning: Keep the motor and electrical connections clean. Use a damp cloth to wipe down surfaces. Avoid high-pressure washing directly on electrical components.
• Connections: Periodically check all electrical connections (motor, display, battery, sensors) to ensure they are secure and free from corrosion.
• Lubrication: Keep your bike's chain and other moving parts properly lubricated.
• Water Resistance: The motor and display have an IP65 waterproof rating, meaning they are protected against dust and low-pressure water jets. Avoid submerging the components in water.
• Battery Care: If you purchased a separate battery, follow its specific maintenance instructions. Generally, store batteries in a cool, dry place and avoid fully discharging them for extended periods.

5. Troubleshooting

• Motor Not Starting:
  • Check battery connection and charge level.
  • Ensure all wiring connections are secure according to the wiring diagram.
  • Verify the display is powered on and showing no error codes.
• No Pedal Assist:
  • Check if the PAS level on the display is set above 0.
  • Inspect the PAS sensor for proper alignment and damage.
• Throttle Not Working:
  • Check the throttle connection to the main wiring harness.
  • Ensure the system is powered on.
• Display Not Working:
  • Check the display's power connection.
  • Ensure the battery has sufficient charge.
• Error Codes: If the display shows an error code, consult the display's specific manual for interpretation and solutions.

6. Specifications

7. Warranty and Support

7.1 Warranty Information

This product comes with a one-year quality warranty. Please note that the warranty is invalid for natural wear and tear or any damage resulting from incorrect operation, misuse, or unauthorized modifications.

7.2 Customer Support

For any technical assistance, troubleshooting beyond this manual, or warranty claims, please contact the seller or manufacturer directly. Provide your purchase details and a clear description of the issue to facilitate a quicker resolution.

8. User Tips

• Battery Compatibility: Always ensure your battery's rated voltage (48V or 52V) matches the motor kit version you have selected. Using an incompatible battery can lead to damage or malfunction.
• Bottom Bracket Measurement: Accurately measure your bike's bottom bracket width and inner diameter before purchasing to ensure the correct motor size (68mm, 100mm, or 120mm) is selected.
• Professional Installation: If you are unsure about any part of the installation process, it is highly recommended to seek assistance from a professional bicycle mechanic or an e-bike specialist.
• Wiring Check: Double-check all wiring connections after installation and before the first ride to prevent electrical issues.
• No Battery Included: The conversion kit typically does not include a battery. A suitable e-bike battery must be purchased separately.

9. Product Video

Watch this video for an animated overview of the Bafang M-Series mid-drive motor, including installation and operation demonstrations.