The DC motor speed is too low. With just a few simple steps, it can be converted into a high speed motor. First, remove the outer casing. Take out the rotor. You’ll see the rotor has many coils. More coils mean a smaller magnetic field, which naturally results in lower speed. This modification method will solve that problem. First, remove the original coils, then rewrap with thicker wire. This time use 0.8 enamel wire. Hang the wire end on top, then wrap it 10 times. The tighter the better. It’s important to ensure the coils are neatly arranged during wrapping. After finishing the first coil, move on to the second commutator. Continue wrapping in the same direction. Wrap it 10 times as well. Make sure to pull the copper wire tight while wrapping. This ensures the wire is more compact. Next, move to the third commutator. Wrap it using the same method. Once done, connect the copper wire ends together. Solder them with an electric soldering iron. Finally, reinstall the outer casing. The motor modification is now complete. Next, it’s time to test it.