Model: M315 MM G340.750.C
This manual provides detailed instructions for the installation, operation, and maintenance of your BAFANG BBS02B 48V 750W Mid Drive Kit. This kit is designed to convert standard bicycles, including fat tire and snow bikes with a 100MM bottom bracket, into powerful electric bicycles. The upgraded CAN protocol motor ensures enhanced stability and a smoother riding experience. Please read this manual thoroughly before installation and use to ensure safe and optimal performance.
For additional support and resources, you may refer to the official user guide PDF: Guia de l'usuari (PDF).
Always prioritize safety when installing and operating your e-bike kit. Failure to follow these safety guidelines may result in injury or damage to the product.
Upon opening the package, please verify that all components listed below are present and undamaged. The kit includes essential accessories for conversion, with battery and charger being optional components.

Figure 3.1: Visual representation of the BAFANG BBS02B Mid Drive Kit packing list.

Figure 3.2: Main components of the BAFANG BBS02B Mid Drive Kit.
The BAFANG BBS02B 750W Mid Drive Motor Kit is compatible with bicycles featuring a 100MM bottom bracket. Please measure your bike's bottom bracket width to ensure compatibility. If your bottom bracket size is between 80-105mm, an extra washer may be required. If your inner diameter is 34-36mm, a bottom adapter might be needed.

Figure 4.1: Bottom bracket measurement and chainring options.
The BBS02B motor operates at 48V with a rated power of 750W. It provides a maximum torque of 100-120 N.m, enabling strong climbing capabilities (30-35° max climbing angle). The motor operates quietly with a noise grade of 50-55dB and is IP65 water-resistant. The total weight of the motor is approximately 4.3KG.

Figure 4.2: BAFANG BBS02B Motor Specifications.
Proper wiring is crucial for the functionality and safety of your e-bike kit. Refer to the diagram below for correct connections. Note that only batteries with BAFANG communication protocol support communication with the display. If your battery does not support this, it can still be compatible with standard setups.

Figure 4.3: BAFANG Mid Drive Kit Wiring Diagram.
If your kit includes a battery, ensure it is securely mounted to your bike frame. Various battery types are compatible, offering different capacities and form factors. Always use the provided charger for optimal battery life and safety.

Figure 4.4: Battery Specification Comparison.
The BAFANG e-bike display provides essential riding information and allows for customization. You can choose from three themes, track metrics like ride time, calories burned, and cadence. Phone navigation can be mirrored on the display for convenience. Motor settings can be customized via an app, eliminating the need for USB cables.

Figure 5.1: BAFANG Display Models Comparison.
Video 5.1: Learn more about the BAFANG BBS motor and its display features. This video demonstrates the functionality and user interface of the BAFANG T1 Touch display, including adjustable parameters, speed limits, and integration with the e-bike system.
The BAFANG kit offers three primary riding modes:
The motor's smooth, controlled starts and adjustable speed limits enhance both Pedal Assist and Throttle modes, providing a tailored riding experience.

Figure 5.2: BAFANG Mid Drive Kit Riding Modes.
Regular maintenance ensures the longevity and optimal performance of your BAFANG mid-drive kit.
This section addresses common issues you might encounter with your BAFANG mid-drive kit.
| Problema | Causa possible | Solució |
|---|---|---|
| El motor no ajuda | Battery low/disconnected; PAS level set to 0; Brake lever sensor engaged; Loose motor connection. | Charge battery/check connection; Increase PAS level; Check brake levers for sticking; Secure motor cable. |
| La pantalla no s'encén | Battery off/low; Loose display cable; Damaged display. | Turn on/charge battery; Check display cable connection; Contact support if damaged. |
| Lectura de velocitat incorrecta | Speed sensor misaligned or damaged; Magnet missing. | Adjust/replace speed sensor; Reattach or replace magnet. |
| Codi d'error a la pantalla | Specific system fault (e.g., motor, controller, sensor). | Refer to the display's specific error code manual for detailed solutions. Common error codes are often related to communication issues or sensor malfunctions. |
If you encounter persistent issues not covered here, please contact BAFANG customer support.
| Característica | Especificació |
|---|---|
| Número de model | M315 MM G340.750.C |
| Tipus de motor | Motor d'accionament mitjà |
| Voltage | 48 Volts |
| Potència nominal | 750 watts |
| Max Torque | 100-120 Nm |
| Bottom Bracket Compatibility | 100MM (suitable for 85-105mm with spacers/adapters) |
| Material | Alumini |
| Resistència a l'aigua | IP65 |
| Grau de soroll | 50-55 dB |
| Pes | 4.3 KG (motor only) |
The BAFANG BBS02B Mid Drive Kit typically comes with a one-year warranty from the date of purchase, covering quality-related issues. Please retain your proof of purchase for warranty claims.
For technical assistance, troubleshooting, or warranty inquiries, please contact the seller or BAFANG customer support. You can often find contact information on the seller's Amazon store page or through the official BAFANG weblloc.
For general inquiries, you may also email: ga_sale_service@163.com.

Figure 9.1: UL Certificate of Compliance for BAFANG Batteries.
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