Bafang Ultra Motor M620 /G510 kit 48V 1000W or 52V 1000W.  If you need frames for the M620 motors, please email us, we have alloy or carbon fibre frames for the Ultra motors.

Our UART motors are with upgraded rotor and third gear which enable the motor quieter. The new rotor and gear are originally designed for M630 1500W motor which is an upgrade for M620 motor.

This motor has two protocols, CAN and UART. CAN protocol is with 5 pin triangle display connector while UART is with 5 pin round display connector.

Packling list for the Ultra M620 kit:

1. Bafang motor Ultra G510;

2. EB-BUS 1T4 cable;

3. Chainwheel: different for MTB or fatbike;

4. Crank arms: different for MTB or fatbike;

5. DPC18 color display;

6. Speed sensor;

7. Headlight and taillight cables;

8. Power cable;

9. Plastic cover;

10. Installation screws;

11. Alloy hanger(optional): if you already have the hanger built with your bike, then you don't need to buy the hanger.

Bafang M400 G330 axle with torque sensor;

The axle provided by Bafang fits for Bafang M400 G330 mid motor.

The length for the axle is 151mm.

There are two versions for Max drive mid motor, standard e-brake motor and coaster brake(pedal brake) mid motor; and the torque sensor for them are different.

There are two protocols for the torque sensors, CAN and UART protocol;  For how to identify the motor is UART or CAN protocol, please check our pictures on the M400 controller page. There is another way to identify. UART protocol torque sensor connectors are with the female connectors which are shown on our pictures; the CAN torque sensor is with the male connectors.

UART Bafang M400/G330 torque sensor e-brake model: MM G330.CB 1.8 TB33(some motor might be with different model name, please email us if you are confusing)

UART Bafang M400/G330  torque sensor coaster brake/pedal brake model: MM G330.CB 1.8 VB3

CANbus Bafang M400/G330 torque sensor e-brake model: SR PA212.32.ST.C

How to replace the Bafang max drive M400 G330 torque sensor, please check below video:

Bafang Ultra G510 M620 motor controller for replacement;

M620 Ultra motor controller for high power e-bikes.

Bafang Ultra controller 48V or 52V for replacement. 

There are two types of M620 torque sensor, CAN protocol and UART protocol, please check your motor protocol before ordering. The CAN protocol motor needs recalibration by the Besst tool after replacing the controller or the torque sensor, please note. If you don't have Besst tool access, please don't order the CANbus controller. If you ordered the controller board, you can use your original case and harness, if you don't know how to install the controller board, we have video for it; it's about a 5-10 minutes job, no soldering for the controller board.

If you don't know how to check your M620 motor protocol, please check from the display's connector: DP C18 display

Note: Some  UART motors may need calibration after replacing the controller. If you don't know how to calibrate the controller manually, you can order a Bafang M620 calibration display(Only for UART) together with the controller.

How to classify UART or CAN protocol for your M620 motor? Please check the connector of the display,  UART protocol motor is with round connector while CAN protocol motor is with triangle display connector. 

For how to calibrate the motor, please check video below: 

Bafang M400 G330 motor controller for replacement. There are two protocols for Bafang G330 controller, UART or CANbus; for CANbus motor, you will need to calibrate the motor after replacing the controller. UART protocol controller will have a "U" mark on the controller, it's EB-BUS connector  is with female connector and the display for the motor would be UART protocol with a 5 pin round connector.  If the display connector is with triangle connector, then it is with CAN protocol. The back of the display may also mark “CAN” . If you don't know how to identiy UART and CANbus motor, please email us. 

The Bafang M400 G330 controllers has several parameters, 36V 250W, 36V 350W, 43V 350W or 48V 350W controllers, please check your own motor before placing the order. By the way, If  your original M400 controller is 48V250W, please choose 48V 350W controller for your motor(Bafang has upgraded 250W 48V controller to be 350W 48V).

If you want a headlight for your bike, you can add a pair Bafang M400 G330 headlight/rearlight cable and a LED headlgiht with the controller.

Note: Coaster brake controller and standard e-brake controller are not compatible. Normally coaster brake motor will have  "CB" marks on the motor. If you are not sure your motor is standard e-brake motor or coaster brake motor, please email us, we will check for you. If you don't know how to identify, please check our picture. The coaster brake controller installs on e-brake motor, the coaster brake controller will be burned at once.

Bafang has two protocols for the max drive mid motor, UART or CAN protocol. How to identify? UART protocol controllers no need calibration; CAN protocol controllers may needs calibration.

How to replace the Bafang M400 G330 controller, please check the video below:

Bafang Ultra M620 G510 barebone motor, no accessories.

48V or 52 1000w for option;

The Ultra M620 motor has two protocols, UART or CAN, you need to check your own display connector or your original motor's protocol first. If the display is with a round connector, it will be UART protocol, if the display is with a triangle disconnector, then your system will be with CAN protocol.  If you don't know how to check, you can check the EB-BUS(1T4 main harness), whether the display connector is round or triangle. We have both EB-BUS for your reference: Ultra M620 EB-BUS 

The display and the controller need to be the same protocol, then the system can work, otherwise, the system will not work.

Bafang Ultra M620 G510 motor pawl clutch, finger freewheel /ratchet wash for repair；

Bafang may have upgraded the pawl clutch. The height has little difference according to our customers' feedback. It's better for you to measure your original pawl clutch height before ordering. Our Bafang Ultra pawl freewheel is 15mm in height. If your motor is not yet openned, you can consider to order the whole Bafang Ultra reduction gear set including the pawl clutch, replacing the whole gear set is ok according to customer's feedback.

How to replace the M620 pawl clutch, please check the video below:

Bafang Ultra Motor metal gear/bearings for replacement;

Bafang has upgraded the gear, it is metal gear rather than nylon gear. 

Two end bearings(6000RS) are 10mm inner diameter,  26mm outer diameter and 8mm in thickness;

The big steel gear is about 53mm in diameter; the small metal gear is about 27.5mm in diameter;

It's the third steel gear of the Bafang Ultra motor.

Bafang upgraded the M620 G510 rotor and the third gears this year to reduce the motor noise. The two rotors are the same with sizes; only the teeth are different; The two third steel gears are also different with teeth numbers, please check our pictures.  If your motor was sourced before 2023, then your motor would be with the old version rotor and the 3rd steel gear; if your motor was sourced this year, please check before ordering or buy the rotor and the 3rd gear together.  

If you want to reduce noice for your Bafang M620 motor, you can try to replace to the new rotor and the new third gear.

Bafang Ultra M620 /G510 middle steel gear for replacement

Bafang MM G330 m400 Motor nylon gear with bearing for replacement；

There would be two versions for the Nylon gear, one is with 4mm gap depth, and the other is with 6mm gap depth.

The height of the bearing is 46mm with 4mm gap gear; the bearing height for 6mm gap gear is 44mm. The two Max drive bearing sets are not compatible. 

44mm gear set is the old version while 46mm gear set is the new version, please check your original bearing before placing the order.

The solo nylon gear only fits for 46mm gear set.

For details, please check the picture for the gear; please double check before placing order.