BAFANG BBS02B / BBS01B Ebike Mid Drive Motor Kit User Manual

1. Introduction

Thank you for choosing the BAFANG BBS02B or BBS01B Ebike Mid Drive Motor Kit. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your mid-drive motor. Please read this manual thoroughly before installation and use to ensure optimal performance and safety.

The BAFANG mid-drive motor is designed to convert a standard bicycle into an electric bicycle, offering enhanced power and efficiency for various riding conditions. These motors are known for their robust design, high torque, and reliable performance.

2. Safety Information

⚠️ Disclaimer: Please mind potential fire risk and strictly follow the instruction manual for charging and storage of any associated battery. This motor kit is intended for use by experienced individuals or under professional supervision. Always wear appropriate safety gear, including a helmet, when operating an e-bike.

• Ensure all connections are secure and waterproof before riding.
• Do not modify the motor or its components. Unauthorized modifications can lead to malfunction and void the warranty.
• Keep children and pets away from the motor during installation and operation.
• Always check local regulations regarding e-bike usage and power limits.

3. Product Overview

The BAFANG BBS02B and BBS01B mid-drive motors are designed for robust performance and easy integration with most standard bicycles. Key features include:

• Brushless Motor Design: Ensures efficient power delivery and longer lifespan.
• High Torque: Provides excellent climbing ability and acceleration.
• Multiple Power Options: Available in 250W, 350W, 500W, and 750W variants to suit different needs and regulations.
• Voltage Compatibility: Supports 36V, 48V, and 52V battery systems (battery not included).
• Waterproof Rating: IP65 rated for protection against dust and water splashes.
• Certifications: CE/EN 14764/ROHS certified, ensuring quality and safety standards.

Mid-drive motors offer several advantages over hub motors, including better weight distribution, improved balance, and superior hill-climbing power due to leveraging the bicycle's gears.

4. Specifications

Below are the detailed specifications for the BAFANG BBS01B and BBS02B mid-drive motor kits:

5. Setup and Installation

Proper installation is crucial for the performance and safety of your e-bike. It is recommended that installation be performed by a qualified bicycle mechanic if you are not confident in your abilities.

5.1. Compatibility Check

The BAFANG BBS01B/BBS02B mid-drive motors are designed for bicycles with a 68mm or 73mm wide bottom bracket. The inner diameter of the bottom bracket shell must be at least 33.5mm.

Important Note: If your bike has a 73mm bottom bracket, you may need to purchase two M6*18 screws separately, as they are typically not included with the motor kit.

5.2. Components and Wiring Diagram

The core product is the mid-drive motor. Other components such as the display, battery, brake levers, throttle, and sensors are typically sold separately or as part of a complete conversion kit. Always verify the contents of your specific purchase.

The wiring diagram illustrates how various components connect to the mid-drive motor. Ensure all connections are firm and correctly oriented. The 1T4 cable is often used to consolidate connections for the display, throttle, and brake levers.

5.3. Installation Steps (General)

1. Remove Existing Components: Remove the crankset, bottom bracket, and any other components that interfere with motor installation.
2. Install the Motor: Slide the BAFANG mid-drive motor into the bottom bracket shell.
3. Secure the Motor: Use the provided mounting plates and nuts to firmly secure the motor to the bicycle frame.
4. Install Chainring and Cranks: Attach the chainring to the motor and then install the crank arms.
5. Connect Electrical Components: Connect the display, throttle, brake levers, speed sensor, and battery to the motor using the appropriate cables. Refer to the wiring diagram (Figure 7) for correct connections.
6. Cable Management: Secure all cables neatly to the frame using zip ties to prevent snagging or damage.
7. Final Checks: Before riding, ensure all bolts are tightened, cables are secure, and all electrical components are functioning correctly.

6. Operating Instructions

Your BAFANG mid-drive motor supports multiple operating modes, providing flexibility for different riding styles and terrains.

6.1. Riding Modes

• Electric Bike Mode: Full electric power, no pedaling required (throttle-controlled).
• Pedal Assisted Mode (PAS): Motor provides assistance based on your pedaling input. The level of assistance can usually be adjusted via the display.
• Walk Assisted Mode: Provides low-speed assistance (typically up to 6 km/h) to help push the bike when walking.
• Manual Mode: Ride the bicycle without any motor assistance, like a traditional bike.

6.2. Display Operation

The display (if purchased) provides information such as speed, battery level, assistance level, and trip distance. Consult the specific manual for your display model for detailed operating instructions.

7. Maintenance

Regular maintenance will prolong the life of your BAFANG mid-drive motor kit.

• Cleaning: Keep the motor and electrical connections clean and free from dirt and debris. Use a damp cloth; avoid high-pressure washing directly on electrical components.
• Lubrication: Periodically lubricate the chain and other moving parts of your bicycle.
• Cable Inspection: Regularly check all cables and connectors for wear, damage, or loose connections.
• Fastener Check: Ensure all mounting bolts and screws for the motor and other components are tight.
• Battery Care: Follow the manufacturer's instructions for battery charging, storage, and maintenance.

8. Troubleshooting

If you encounter issues with your BAFANG mid-drive motor, consider the following common troubleshooting steps:

• Motor Not Powering On: Check battery connection, ensure the battery is charged, and verify all electrical connections are secure. Check the display for error codes.
• No Pedal Assist: Ensure the PAS sensor is correctly installed and aligned. Check for any loose wires to the sensor.
• Motor Cutting Out: This could indicate an overheating motor (allow it to cool), a low battery, or a loose connection.
• Unusual Noises: Inspect the motor for any loose parts or obstructions. Check the chainring and chain for proper alignment and wear.

For persistent issues, consult a qualified e-bike technician or contact BAFANG customer support.

9. User Tips

• Kit Contents: Be aware that the core product is the mid-drive motor itself. Essential accessories like the battery, display, brake levers, and throttle are often sold separately. Always confirm what is included in your specific purchase to avoid surprises.
• Bottom Bracket Measurement: Double-check your bicycle's bottom bracket width (68mm or 73mm) before purchasing to ensure compatibility. Measure accurately to avoid installation issues.
• Professional Installation: If you are not experienced with bicycle mechanics or electrical wiring, consider having the motor installed by a professional to ensure safety and proper function.

10. Warranty and Support

BAFANG mid-drive motors typically come with a one-year warranty. Please retain your proof of purchase for warranty claims.

• Warranty Coverage: Covers manufacturing defects under normal use.
• Exclusions: Does not cover damage due to improper installation, misuse, accidents, unauthorized modifications, or normal wear and tear.
• Customer Support: For technical assistance, warranty claims, or spare parts, please contact your retailer or the official BAFANG support channels.