Does it just seem noisy at low speeds and does it clear at high speeds? When you let off the power is it noisy?
If the above does happen this is a normal sound of a X12, this is purely down to the rotor generating alot of magnetism from the magnets within the can. I found running a high rev/low torque rotor for the X12 has cured the noise and made it easier to drive in all conditions.
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