this moment arm set gives extra strength to the frame to absorb the high torque of the motor. In some cases, the motor produces so much torque that the axis thereof will rotate in the fork and thus the fork and the motor cable damaged.
The moment arm can be easily attached in the eye / hole of the fender mounting of the fork.
This moment arm is recommended for use with the V-HT wheel motor in a standard fork.
When the swing arm is not strong enough (V HT rear motor), this moment arm should also be used.