BAFANG BBS01B 36V 250W Mid-Drive Ebike Motor Conversion Kit User Manual

Introduction

This manual provides essential instructions for the installation, operation, and maintenance of your BAFANG BBS01B 36V 250W Mid-Drive Ebike Motor Conversion Kit. Please read this manual thoroughly before installation and use to ensure proper function and safety. This kit is designed to convert standard bicycles into electric bicycles, offering three driving modes: pure electric, power-assisted, and manpower.

Important Safety Information

Always wear a helmet when riding an electric bicycle.
Ensure all connections are secure and waterproof before riding.
Do not modify the motor or battery system. Unauthorized modifications can lead to malfunction and void warranty.
Regularly check brakes, tires, and all components for wear and damage.
Adhere to local traffic laws and regulations for electric bicycles.
Keep children and pets away from the motor and battery during installation and charging.

Package Contents

Verify that all components are present and undamaged upon opening the package.

BAFANG BBS01B Mid-Drive Motor (36V 250W)
C961 Display (with 9 levels of pedal assist and automatic backlight)
Brake Levers (compatible with mechanical brakes)
Thumb Throttle
Crank Arms
Speed Sensor with Magnet
1T4 Main Cable Harness
Mounting Screws and Accessories
Chainring (specific size may vary)

BAFANG BBS01B Mid-Drive Motor Kit Components — Image: Overview of the BAFANG BBS01B mid-drive motor kit components, including the motor, display, battery, chainring, and various accessories.

Technical Specifications

Feature	Specification
Motor Type	Mid-Drive Motor
Model	BBS01B
Rated Voltage	36 Volts
Rated Power	250 Watts
Max Torque	80 N.m
Max Speed (Assisted)	25 km/h
Motor Weight	3.8 Kilograms (8.38 Pounds)
Bottom Bracket Compatibility	68mm (JIS standard turret)
Display	C961 (9 levels PAS, auto backlight)

BAFANG BBS01B Motor Specifications — Image: Visual representation of the BAFANG BBS01B motor's key specifications, including 36V 250W rated power, 80 N.m max torque, 25 km/h max speed, and 3.8 kg weight.

BAFANG Mid-Drive Motor Dimensions — Image: Table detailing dimensions (A, B, C, D) for various BAFANG motor models, including 250W/350W, 500W, 750W, and 1000W, along with voltage, max torque, max speed, and bottom bracket length compatibility.

BAFANG Display Model Comparison — Image: Comparison table for BAFANG display models C961, C965, and C18, highlighting features like average speed, max speed, real-time speed, riding period, phone charge capability, power display type, voltage compatibility, and password function.

Compatibility

The BAFANG BBS01B kit is designed for bicycles with a standard JIS 68mm bottom bracket. This includes most mountain bikes, road bikes, commuter bikes, and folding bikes. It is crucial to measure your bicycle's bottom bracket length to ensure compatibility before installation.

Bottom Bracket Measurement for BAFANG Kit — Image: Diagram illustrating the measurement of a bicycle's bottom bracket, indicating a required length of 68mm for compatibility with the e-bike conversion kit.

Ensure sufficient space is available on your bicycle frame for the motor and battery placement.

BAFANG Battery Type Compatibility — Image: Table listing various BAFANG battery types (U004, Hailong S039-5, Hailong S039-3, Hailong S039, Hailong R049-2) with their parameters including voltage, amperage, BMS, weight, energy capacity, and cycle life.

Setup and Installation Guide

Installation of the BAFANG mid-drive motor kit requires basic mechanical skills and appropriate tools. If you are unsure about any step, it is recommended to seek professional assistance.

Overview of Components and Connections

BAFANG Mid-Drive Motor Wiring Diagram and Exploded View — Image: Detailed diagram showing the exploded view of the BAFANG mid-drive motor assembly with components like chain guard, chainring, cranks, fixed bracket, and nuts. Below, a wiring diagram illustrates connections for the motor, battery, display, brake levers, throttle, speed sensor, and optional front lamp and gear shift sensor.

Installation Steps (Summary)

Prepare the Bicycle: Remove the existing bottom bracket, crankset, and chain.
Install the Motor: Insert the BAFANG mid-drive motor into the bottom bracket shell. Secure it with the provided fixed bracket, nuts, and screws.
Attach Crank Arms and Chainring: Install the new chainring and crank arms onto the motor spindle.
Mount Display and Controls: Attach the C961 display, brake levers, and thumb throttle to the handlebars.
Install Speed Sensor: Mount the speed sensor on the rear chainstay and attach the magnet to a spoke on the rear wheel. Ensure proper alignment and gap.
Connect Wiring: Connect all components to the 1T4 main cable harness, then connect the harness to the motor. Ensure all connections are firm and correctly oriented.
Install Battery: Mount your compatible 36V battery securely on the bicycle frame and connect it to the motor system.
Cable Management: Secure all cables neatly with zip ties to prevent snagging or damage.

BAFANG Mid-Drive Motor System on a Bicycle — Image: An electric bicycle equipped with the BAFANG mid-drive motor system, highlighting the LCD HMI display (1), speed sensor (2), and central motor system (3) for a visual overview of the installed components.

Operating Instructions

Powering On/Off

To power on the system, press and hold the power button on the C961 display. To power off, press and hold the same button until the display turns off.

C961 Display Functions

The C961 display provides real-time information and allows you to adjust settings.

Speed Display: Shows current, average, and maximum speed.
Battery Level: Indicates remaining battery charge.
Pedal Assist System (PAS) Level: Adjust assistance levels (1-9) using the '+' and '-' buttons. Higher numbers provide more motor assistance.
Trip Distance/Odometer: Displays current trip distance or total mileage.
Backlight: Automatic backlight for visibility in varying light conditions.

Driving Modes

The BAFANG BBS01B kit offers three distinct driving modes:

Manpower Mode: The motor provides no assistance. The bicycle operates like a standard pedal bike.
Power-Assisted Mode (PAS): The motor provides assistance based on your pedaling input and the selected PAS level. This is the primary mode for electric cycling.
Pure Electric Mode (Throttle): The motor provides power directly via the thumb throttle, without requiring pedal input. This mode is typically used for short bursts of speed or starting from a stop.

BAFANG BBS01B Driving Modes — Image: Illustrates the three driving modes: Manpower Model (pedaling only), Power Mode (pedaling with motor assistance), and Pure Electric Mode (throttle-only operation).

Maintenance

Regular Cleaning: Keep the motor, battery, and display clean. Use a damp cloth; avoid high-pressure washing directly on electrical components.
Check Connections: Periodically inspect all electrical connections for corrosion or looseness.
Lubrication: Keep the chain and other moving parts of the bicycle properly lubricated.
Battery Care: Store the battery in a cool, dry place. Avoid fully discharging the battery and charge it regularly, even when not in use, to prolong its lifespan.
Professional Inspection: Consider a professional inspection of the motor and electrical system annually.

Troubleshooting

Problem	Possible Cause	Solution
Motor not powering on	Battery not connected or discharged; loose wiring; display issue.	Check battery connection and charge level. Inspect all cable connections. Try restarting the display.
No pedal assist	PAS level set to 0; speed sensor misaligned or damaged; brake levers engaged.	Increase PAS level on display. Check speed sensor alignment and magnet. Ensure brake levers are not stuck.
Throttle not working	Throttle cable loose or damaged; system error.	Check throttle cable connection. Consult a technician if problem persists.
Display shows error code	Specific component malfunction.	Refer to the C961 display manual for specific error code meanings and solutions.

Warranty and Support

BAFANG products typically come with a manufacturer's warranty covering defects in materials and workmanship. Please refer to your purchase documentation or the official BAFANG website for specific warranty terms and conditions.

For technical support, spare parts, or warranty claims, please contact your authorized BAFANG dealer or the BAFANG customer service department. Keep your purchase receipt and product serial number readily available.

Manufacturer: BAFANG

Date First Available: March 18, 2024

	Bafang BBS Series Drive System User Manual Comprehensive user manual for the Bafang BBS Series Drive System, covering installation, operation, maintenance, and troubleshooting for e-bike conversion kits.
	BAFANG BBS01/BBS02 Mid-Drive E-bike Motor Installation Manual \| eMax eBikes Comprehensive installation manual for the BAFANG BBS01 and BBS02 mid-drive electric bike motor kits. Includes technical specifications, assembly steps, wiring diagrams, and warranty information from eMax eBikes.
	Bafang Bottom Bracket Measurement Guide for BBS02/BBSHD E-bike Mid-Drives Download and print this Bafang measurement guide to accurately determine your bicycle's bottom bracket diameter, shell thickness, and width. Essential for ensuring proper fitment of Bafang BBS02 (750W) and BBSHD (1000W) mid-drive motors. Includes printable template and instructions.
	Bicycle Bottom Bracket Measurement Guide A comprehensive guide to accurately measure your bicycle's bottom bracket diameter, shell thickness, and width using a printable gauge.
	Bafang BBS Series Drive System User Guidance Manual Comprehensive user manual for Bafang BBS Series mid-drive eBike conversion kits, detailing models like M215, M315, M615, controller specifications, installation tools, maintenance, and safety precautions. Features Varstrom partnership.
	Bafang Mid-Drive Ebike Programming Guide: Enhance Performance Learn how to reprogram your Bafang mid-drive ebike system for improved usability and performance. This comprehensive guide covers necessary hardware, software, configuration tool instructions, and detailed explanations of all settings for Bafang BBS02 and BBSHD motors.

BAFANG BBS01B