Things You'll Need
Instructions
Remove the engine shell by turning the engine upside down and removing screws or gently prying open the plastic tabs, and set the shell aside.
Brush away all visible dirt, fibers, dust and debris with a quarter-inch flat brush using short, quick strokes.
Remove trapped debris with tweezers and toothpicks as necessary.
Apply a small amount of denatured alcohol to a clean cloth and gently wipe down the chassis, wheels and axles, and motor to remove dirt, grease and grime. Use a cotton swab or toothpick where necessary.
Pour a small amount of model engine lubricant into a clean bottle cap.
Dip a toothpick into the the engine lubricant and apply small amounts of oil to the wheel bearings, axle bearings, gear shaft and motor bearings. Bearings are the points of contact that restrict motion of moving parts and are typically plastic or metal rings or housings holding a shaft or other part in place.
Test the engine on the track before putting the shell back on and re-lubricate as necessary.