1. Introduction and Product Overview
The BAFANG Mid Drive Kit 1000W BBS-HD is a powerful electric bike conversion kit designed to transform standard bicycles into high-performance e-bikes. This kit includes essential accessories such as brake levers, chainwheel, thumb throttle, speed sensor, headlight, bottom bracket removal tool, and optional battery and LCD display. It offers unmatched compatibility with bottom brackets of 68-73mm, 100mm, and 120mm lengths, and internal diameters of 33.5-36mm, making it ideal for mountain, road, and commuter bikes. Please note, it is not suitable for carbon fiber frames or bikes with coaster brakes. The BAFANG1000W BBS-HD G320 motor delivers a powerful 160 N.m torque, enabling speeds up to 45KMH and effortless hill climbing. It supports Throttle, Pedal Assistance, and Standard Cycling modes for a customizable riding experience.

Figure 1: Overview of the BAFANG Mid Drive Kit 1000W BBS-HD components.

Figure 2: Key features of the BAFANG BBS-HD 1000W Mid Drive Kit, including motor power, max torque, max speed, and efficiency.
2. Setup and Installation
The BAFANG Mid Drive Kit is designed for straightforward installation. Most necessary accessories and tools are included. For detailed visual guidance, please refer to the official installation video below.
Video 1: Official BAFANG BBS Mid Drive Motor Installation Guide. This video demonstrates the step-by-step process of installing the conversion kit on a bicycle, including crankset removal, motor mounting, and cable connections.
2.1. Compatibility Check
Before installation, ensure your bike's bottom bracket is compatible. The kit supports 68-73mm, 100mm, and 120mm lengths with an inner diameter of 33.5-36mm (JIS norms). Carbon fiber frames and bikes with coaster brakes are not compatible.

Figure 3: Visual guide to determine if the BAFANG motor kit fits your bike, focusing on bottom bracket length and inner diameter, and incompatible frame types.

Figure 4: Further details on checking bike compatibility, including measuring bottom bracket length and inner diameter, and ensuring sprocket clearance.
2.2. Included Components and Tools
The kit comes with the BAFANG 1000W Mid Drive Kit, LCD-Display, Speed Sensor, Thumb Throttle, 1T4 Cable, Chainwheel, Cranks, Headlight, nuts, and essential tools like a wrench, crank removal tool, and bottom bracket remover.

Figure 5: A visual representation of the packing list and how components connect during installation.
2.3. Brake System Options
The motor kits default to brake sensors for original hydraulic brakes. If you need mechanical brake levers, please contact the seller. Brake sensors can be installed on hydraulic brakes by adding a provided magnet inside the brake lever and adjusting its position using the brake signal shown on the main display.

Figure 6: Illustration of different brake system options and their compatibility with the BAFANG kit, including hydraulic brake sensors and mechanical brake levers.
3. Operating Instructions
The BAFANG BBS-HD kit offers multiple operating modes: Throttle, Pedal Assistance, and Standard Cycling. The LCD display provides real-time information and allows for customization of settings.
3.1. Display Options
Various LCD display options are available, including EKD01, DPC18, P860C, DZ40, DM03, 500C, and 800S. Each display offers different screen sizes, voltage compatibility, and features like Bluetooth connectivity and light sensation.

Figure 7: Comparison of various BAFANG LCD display models, highlighting screen size, voltage compatibility, and available features.

Figure 8: A detailed table comparing different BAFANG display models, including screen type, voltage/percentage display, holder size, speed limit, Bluetooth, boot password, light sensation, PAS level, and USB port availability.
4. Maintenance
Regular maintenance is crucial for the longevity and optimal performance of your BAFANG e-bike conversion kit. Keep all components clean and free from dirt and debris. Periodically check all electrical connections for secure fit and inspect cables for any signs of wear or damage. Ensure the chain is lubricated and the chainwheel is free from excessive wear. For any uncertainties or queries regarding maintenance, please contact customer support.
5. Troubleshooting
If you encounter any issues with your BAFANG Mid Drive Kit, consider the following basic troubleshooting steps:
- No Power to Display/Motor: Check all cable connections, especially the main power cable from the battery to the motor and the 1T4 cable. Ensure the battery is charged and properly seated.
- Motor Not Engaging: Verify that the speed sensor is correctly installed and aligned with the magnet (check the small red LED indicator on the sensor). Ensure the brake levers are not engaged, as they may have motor inhibitor sensors.
- Inconsistent Pedal Assist: Check the PAS sensor for proper alignment and cleanliness.
- Error Codes on Display: Refer to your specific LCD display's manual for a list of error codes and their corresponding solutions.
For persistent issues, it is recommended to contact BAFANG customer support for further assistance.
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | BAFANG |
| Model Name | BBSHD |
| Color | Black |
| Material | Aluminum |
| Rated Power | 1000W |
| Max Torque | 160 N.m |
| Max Speed | Up to 45KMH |
| Bottom Bracket Compatibility | 68-73mm, 100mm, 120mm (length); 33.5-36mm (inner diameter) |
| Motor Position | Mid Crank |
| Motor Type | Brushless Gear Motor |
| Controller | Integrated inside the motor |
| Chainring Options | 44T/46T/48T/52T (specific options may vary) |
| Suggested Users | Unisex-adult |
| Part Number | US JJ DZ 1000W Mid Drive Kit |

Figure 9: Visual representation of key motor specifications including rated power, max torque, weight, and max speed.

Figure 10: Available chainring options for the BBS-HD (1000W) and BBS (500W/750W) motors, with dimensions and compatibility notes.
7. Warranty and Support
The BAFANG Mid Drive Kit comes with a 30-day return policy and a 365-day repair or replace warranty. For any questions, installation guidance, or support needs, please feel free to contact BAFANG customer service. They are available to assist you with any uncertainties or queries while setting up or using your product.