This video demonstrates how to balance an outrunner motor using the 4 point method. Small motors normally don't require balancing however larger motors may. A small imbalance was simulated for this tutorial using black PVC tape. The device used to balance is the Dynexhobby Impulse. Please visit www.dynexhobby.com for further information.

SAFETY FIRST
Never stand in front of or alongside a spinning rotor. Stand behind at a safe distance.
Ensure bystanders are well away from the test article at a safe distance.
NEVER run a rotor at full speed when balancing. Mounting cradles are not designed to restrain running devices at operational speeds.
Run devices at the slowest possible speeds to avoid injury.
Do not leave loose items nearby that can be caught by a spinning rotor.
Secure all loose cables to prevent being caught in moving parts.
Always stop running devices before working on them.
Never place a limb in front of a rotor to stop it or slow it down.
Fasten devices in secure mounts when operating at full speed. Follow the manufacturer’s instructions for correct device operation.