Brushless motors have very few parts, so it’s easy to take them apart for cleaning. Most are held together by a few screws on the front, back, or sides of the motor case. Remove the screws, disassemble the motor and lay the parts on a clean rag. Be sure you don’t lose any spacers or washers that are used to properly align the motor shaft (and magnets) inside the motor. Also note the order in which the spacers or washers are installed.

It is a good idea to put the rotor into a plastic bag to keep it clean. Any metallic bits that the rotor attracts will be removed with the bag.

Just as with regular brushed motors, dirt can accumulate inside a brushless motor. We do not recommend the use of motor spray to clean the windings inside the motor can (stator). Racers who use motor spray simply make any problems worse. Instead, use a small brush and light air pressure to clean inside the motor.

Use a small brush and compressed air to clean the inside of the motor.

Remove the rear bearing from the motor for cleaning. The front bearing on Novak brushless motors is glued to the front endbell and cannot be removed; leave the front bearing in place, and give it a good dousing with motor spray.

Douse the bearings with motor spray, and then put them aside to dry.

Check the clean disassembled motor pieces for signs of wear. Make sure that the windings in the can aren’t loose, chafed, or shiny. Check the magnets for rub marks, and make sure they aren’t chipped or loose.

Inspect the major components for signs of wear. A loose winding or a damaged magnet means that your motor needs factory service.