Four-wheel drive motor carbon brush: special carbon brush for motor upgrade, with a copper content of 88%, suitable for the transformation and upgrade of the motor, so that the motor has a longer life and better quality.
Explanation: Some friends say that the carbon brush head of this carbon brush is installed wrong, in fact, it is true. When this carbon brush head is attached to the commutator head of the rotor, it cannot be completely attached at first, leaving a gap, but wait When the carbon brush is rubbed after turning, the carbon brush will be completely close to the commutator head. This is simple counter-physics common sense. After many years of practice, quality is guaranteed.