Quick answer
To replace the 2845 brushless motor on your HM164, remove the old motor and pinion, transfer the pinion to the new motor, secure the motor and reconnect the wires, then test at low speed before running.
Why use the original 2845 motor
The BEZGAR 2845 Brushless Motor is an original spare part for the HM164, so it drops in without adapter plates or wiring changes. Generic 2845 motors may fit physically but can differ in connectors or sensor setup, which adds risk and time. If you want a straight swap, the original part is the safer choice.
Tools and parts you will need
Gather a small hex driver set, needle-nose pliers, a pinion puller or small flathead screwdriver, threadlocker, and a clean cloth. Have the replacement motor and the original pinion ready. Work on a clear, well-lit surface so small screws and the pinion don’t get lost.
HM164 motor replacement steps
- Disconnect the battery and remove the old motor: Power off the car and unplug the battery. Disconnect the motor wires, then unscrew the motor mount screws and lift the old motor out. Label the motor wires before disconnecting to avoid mix-ups during reinstallation.
- Remove the pinion gear from the old motor: Use a pinion puller or gently pry with a flathead screwdriver to slide the pinion off the old motor shaft. Avoid bending the shaft. If the pinion is stuck, apply a small amount of heat to loosen any threadlocker.
- Install the pinion on the new 2845 motor: Slide the pinion onto the new motor shaft, align it with the spur gear, and tighten the set screw. Apply a small amount of threadlocker to the set screw. Check that the pinion is fully seated and the set screw is tight before proceeding.
- Mount the new motor and set gear mesh: Secure the new motor with the mounting screws. Adjust the motor position so there is a small amount of play between the pinion and spur gear, then tighten fully. A gear mesh that is too tight will overheat the motor; too loose will strip the gears.
- Reconnect the wires and test at low speed: Reconnect the motor wires to the ESC, matching polarity if marked. Power on and slowly increase throttle to check for smooth operation and unusual noise. If the motor stutters or runs backwards, swap any two motor wires to reverse direction.
Product facts
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2845 Brushless Motor for HM164: Original BEZGAR spare part designed specifically for the HM164 model. Ensures 100% compatibility, so you avoid fitment issues and extra modification.
2845 Brushless Motor for HM164