Introduction
This instruction manual provides essential information for the safe and effective installation, operation, and maintenance of your Kuayi MY1020 36V 800W DC Electric Brush Motor. Please read this manual thoroughly before using the product to ensure proper function and to prevent damage or injury. Keep this manual for future reference.
Product Overview
The Kuayi MY1020 is a robust 36V 800W DC electric brush motor designed for various light electric vehicle applications. Its durable aluminum body and copper movement ensure reliable performance. The motor features an 11-tooth sprocket compatible with a #25H chain and supports both clockwise (forward) and counter-clockwise (reverse) operation.
Key Features:
- Power Output: 800W at 36V DC
- Construction: All-aluminum body with copper movement
- Sprocket: 11-tooth, compatible with #25H chain
- Operation: Forward (clockwise) and Reverse (counter-clockwise) capabilities
- Efficiency: Equal to or greater than 75%
- Applications: Suitable for tricycles, bicycles, e-scooters, go-karts, ATVs, mopeds, and mini bikes

Image 1: The Kuayi MY1020 36V 800W DC Electric Brush Motor, shown from a top-front angle, highlighting its compact design and the output sprocket.
Safety Information
Always prioritize safety when working with electrical components. Failure to follow these safety guidelines may result in electric shock, fire, or serious injury.
- Disconnect Power: Always ensure the power source is disconnected before performing any installation, maintenance, or troubleshooting.
- Proper Wiring: All electrical connections must be secure and insulated to prevent short circuits. Consult a qualified electrician if unsure.
- Ventilation: Ensure adequate ventilation around the motor during operation to prevent overheating.
- Personal Protective Equipment (PPE): Wear appropriate safety gear, such as gloves and eye protection, when handling the motor and its components.
- Avoid Water: Do not expose the motor to water or excessive moisture.
- Secure Mounting: Ensure the motor is securely mounted to prevent movement or detachment during operation.
- Children and Pets: Keep children and pets away from the motor and its operating area.
Setup and Installation
1. Mounting the Motor
The motor features integrated mounting brackets for secure attachment. Ensure the mounting surface is flat and robust enough to support the motor's weight and operational forces. Use appropriate fasteners (not included) to secure the motor firmly.

Image 2: A dimensional drawing of the Kuayi MY1020 motor, illustrating key measurements such as diameter, length, bracket width, and sprocket size (11T).
2. Electrical Connections
The motor requires a 36V DC power supply. Connect the motor's red wire to the positive (+) terminal of your 36V power source and the black wire to the negative (-) terminal. Ensure all connections are tight and properly insulated. The motor is designed for both forward and reverse operation; the direction is determined by the polarity of the power supply or through a suitable motor controller (not included).

Image 3: Side view of the Kuayi MY1020 motor, showing the attached wiring harness with red and black wires, and the product label with specifications.

Image 4: An angled view of the Kuayi MY1020 motor, displaying the wiring and an included white connector, which can be used for specific applications.
3. Chain Installation
Install a #25H chain onto the 11-tooth sprocket of the motor. Ensure the chain has proper tension – not too tight to cause excessive wear, and not too loose to slip. Adjust as necessary according to your vehicle's design.
Operation
Once properly installed and connected, the motor is ready for operation. Apply 36V DC power to activate the motor. The motor will rotate clockwise when the red wire is positive and the black wire is negative. Reversing polarity will cause counter-clockwise rotation. Always ensure the motor is operating within its specified voltage and current limits.
- Initial Test: Before full operation, perform a brief test to confirm correct rotation and smooth running.
- Load Management: Avoid overloading the motor, as this can lead to overheating and reduced lifespan.
- Monitoring: Periodically check the motor for unusual noises, excessive heat, or vibrations during operation.
Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your motor.
- Cleanliness: Keep the motor free from dirt, dust, and debris. Use a dry cloth or compressed air for cleaning.
- Connections: Periodically inspect all electrical connections for tightness and corrosion.
- Sprocket and Chain: Check the sprocket for wear and ensure the chain is properly lubricated and tensioned.
- Ventilation Holes: Ensure the ventilation holes on the motor casing are clear and unobstructed to allow for proper cooling.

Image 5: Top view of the Kuayi MY1020 motor, highlighting the ventilation holes on the silver end cap, crucial for heat dissipation.
Troubleshooting
This section addresses common issues you might encounter with the motor.
| Problem | Possible Cause | Solution |
|---|---|---|
| Motor does not start | No power supply; Loose wiring; Faulty controller (if used) | Check power source; Inspect all connections; Test controller functionality. |
| Motor runs slowly or with reduced power | Low voltage; Overload; Worn brushes; Excessive chain tension | Verify 36V supply; Reduce load; Inspect/replace brushes; Adjust chain tension. |
| Motor overheats | Overload; Insufficient ventilation; Prolonged operation | Reduce load; Ensure clear ventilation; Allow motor to cool periodically. |
| Unusual noise or vibration | Loose mounting; Worn bearings; Damaged sprocket/chain | Tighten mounting bolts; Inspect bearings; Check sprocket and chain for damage. |
Technical Specifications
| Specification | Value |
|---|---|
| Model Number | MY1020-800W |
| Voltage | 36 Volts DC |
| Rated Power | 800 Watts |
| Rated Speed | 2800 RPM |
| Rated Current | 29.2 Amps |
| Rated Torque | 2.8 N.m |
| Efficiency | ≥ 75% |
| Material | Aluminum |
| Item Weight | 5.5 Kilograms |
| Sprocket | 11-tooth |
| Compatible Chain | #25H Chain |
Warranty and Support
Specific warranty information for the Kuayi MY1020 36V 800W DC Electric Brush Motor is not provided in this manual. For details regarding warranty coverage, technical support, or replacement parts, please contact the manufacturer or your point of purchase directly. Ensure you have your product model number (MY1020) and purchase date available when seeking support.