BAFANG M420 User Manual

11
DEALER MANUAL FOR MOTOR
BF-DM-C-MM G332-EN October 2019
6.3.7 External Speed Sensor Installation
Speed sensor
Magnet for the speed sensor
A
B
Fasten the mounting screws through the speed sensor and with a cross screwdriver. Tightening the
speed sensor onto the frame. Then place the rubber seal on the speed sensor hiding the screw. Torque
requirement: 1.5-2 N.m.
(Note: Please make sure the gap between the speed sensor and the magnetic unit is between 10 and 20
mm. When the magnet is not the correct distance, this can cause Error 21)
Now place the magnet on the spoke of the wheel ensuring it is aligned to the middle of the speed
sensor. And with a star key tighten the magnet in place. Torque requirement: 1.5-2 N.m.

BAFANG M420 Specifications

General

Rated Voltage	36 V
Power	250 W
Gear Sensor	Yes
Type	Mid Motor
Max Torque	80 Nm