1. Product Overview
This manual provides essential information for the installation, operation, and maintenance of your BAFANG Mid Drive Motor Ebike Conversion Kit. This kit is designed to convert standard bicycles into electric bikes, offering enhanced performance and assistance.
The BAFANG Mid Drive Motor is known for its robust design and efficient power delivery, making it suitable for various cycling applications including mountain biking, road cycling, and commuting.
2. Compatibility Requirements
Ensure your bicycle meets the following specifications for proper installation and safe operation of the BAFANG Mid Drive Motor Kit:
- Bottom Bracket Length: Compatible with standard bicycle bottom brackets measuring 68-73 mm in length.
- Bottom Bracket Inner Diameter: The inner diameter of the bottom bracket must be 34-36 mm, adhering to the JIS standard.
- Frame Material: It is not recommended to install this conversion kit onto a carbon fiber frame.
- Chainstay Clearance: Verify that the motor's sprocket will not interfere with your bike's chainstay.
Image: Compatibility guidelines for the BAFANG mid-drive motor, illustrating the required bottom bracket dimensions (68mm length, 33.5mm inner diameter) and a clear warning against installation on carbon fiber frames. It also shows how to check for chainstay clearance.
3. Package Contents
The BAFANG Mid Drive Motor Ebike Conversion Kit typically includes the following components:
- Mid Drive Motor (36V, 250W)
- C18 Display (with 9 levels of pedal assistance and automatic backlight)
- Brake Levers (e-brake compatible)
- Thumb Throttle
- Pedals (crank arms)
- Speed Sensor
- 1T4 Cable
- Mounting Screws and Fixed Bracket
- Chainring and Chain Guard
Note: An e-bike battery is optional and not included in the standard kit. Gear shift sensors are also not included.
Image: An overview of the BAFANG mid-drive motor conversion kit components, including the motor, C18 display, throttle, e-brake levers, 1T4 cable, front lamp, speed sensor, chainring, and crank arms. The image also depicts a bicycle with the kit fully installed.
4. Installation Guide
The BAFANG Mid Drive Motor Kit is designed for straightforward installation. A detailed installation manual is included with your kit. For a comprehensive guide, please refer to the official PDF manual available for download: Installation Manual (PDF).
4.1. Motor Assembly
Follow the exploded view diagram to correctly assemble the motor components onto your bicycle's bottom bracket. Ensure all screws are tightened securely.
Image: An exploded view diagram detailing the installation of the BAFANG mid-drive motor. It illustrates the placement of the mid-motor, bottom bracket, fixed bracket, chainring, chain guard, right and left cranks, and associated fasteners (5-M5*12 screws, 5-ST3.9*6 screws, M33-PH nut, M33 aluminum nut).
4.2. Battery Connection
Connect your e-bike battery to the motor using the appropriate connector type. Pay close attention to positive (+) and negative (-) terminals to ensure correct polarity. The kit uses a Big Bullet Connector for the main power connection.
Image: A diagram showing the battery connector type for the BAFANG motor. It highlights the positive (+) and negative (-) connections using big bullet connectors and indicates the communication line. A note clarifies that the battery itself is not included.
4.3. Wiring Diagram
Follow the wiring diagram carefully to connect all peripheral components such as the display, brake levers, thumb throttle, speed sensor, and front lamp to the main motor unit. The 1T4 cable simplifies many of these connections.
Image: A comprehensive wiring diagram for the BAFANG mid-drive motor kit. It illustrates how to connect the central motor unit to the C18 display, left and right e-brake levers, thumb throttle, speed sensor, and front lamp. It also shows optional connections for a battery (not included) and a gear shift sensor (not included).
5. Operating Instructions
Once installed, the BAFANG Mid Drive Motor Kit provides powerful and efficient assistance for your rides. The C18 display allows you to control various aspects of your e-bike.
- Power On/Off: Use the power button on the C18 display to turn the system on or off.
- Pedal Assist Levels: The C18 display offers 9 levels of pedal assistance. Adjust these levels using the display controls to match your desired assistance and riding conditions.
- Automatic Backlight: The C18 display features an automatic backlight for improved visibility in varying light conditions.
- Thumb Throttle: Use the thumb throttle for instant power delivery, independent of pedaling.
- Brake Levers: The e-brake levers cut off motor power when engaged, ensuring safe braking.
Image: Key operational specifications of the BAFANG motor, including a rated power of 36V 250W, a maximum speed of 25 km/h, a maximum torque of 80 N.m, and a weight of 3.8 kg. Accompanying icons highlight its capability for slopes up to 30°, keypad control, efficiency greater than or equal to 80%, and ease of installation.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your BAFANG Mid Drive Motor Kit.
- Cleanliness: Keep the motor and all components clean from dirt and debris.
- Connections: Periodically check all electrical connections for tightness and corrosion.
- Fasteners: Ensure all mounting screws and bolts are secure.
- Cable Inspection: Inspect cables for any signs of wear, fraying, or damage.
- Professional Service: For complex issues or internal motor maintenance, consult a qualified e-bike technician.
7. Troubleshooting
If you encounter issues with your BAFANG Mid Drive Motor Kit, consider the following basic troubleshooting steps:
- No Power: Check battery connection, ensure the battery is charged, and verify all main power cables are securely connected.
- Display Not Working: Check the display cable connection to the motor.
- Motor Not Assisting: Ensure pedal assist level is set above zero. Check speed sensor connection and magnet alignment. Verify brake levers are not engaged, as they cut motor power.
- Error Codes: Refer to the C18 display manual for specific error code interpretations and solutions.
If problems persist, please contact BAFANG customer support for assistance.
8. Specifications
Detailed specifications for the BAFANG Mid Drive Motor Kit (36V-250W model):
| Specification | Value |
|---|---|
| Brand | BAFANG |
| Model Number | 36V-250W Motor Kit 46T -C18 |
| Rated Power | 250 Watt |
| Voltage | 36 Volt |
| Max. Torque | 80 N.m |
| Max. Speed | 25 km/h |
| Item Weight | 6.8 Kilogram |
| Bottom Bracket Length Compatibility | 68-73 mm |
| Package Dimensions | 31.75 x 27.94 x 24.64 cm |
| UPC / GTIN | 783779999040 |
For other motor models (e.g., 500W, 750W, 1000W), dimensions and performance specifications may vary. Refer to the table below for a comparison:
Image: A comparative table outlining the dimensions (A, B, C, D) and key specifications (Voltage, Max torque, Maximum speed, Bracket bottom length) for different BAFANG motor models, including 250W/350W, 500W, 750W, and 1000W variants.
9. Warranty and Support
BAFANG products are manufactured to high-quality standards. If any part is missing from your kit upon arrival, or if you experience any issues not covered in this manual, please contact BAFANG customer support immediately for resolution.
Please retain your proof of purchase for warranty claims. Specific warranty terms and conditions may vary by region and retailer.
