How can you reverse the rotation on a CSR motor?

Reversing the rotation of a CSR (Capacitor Start Run) motor is accomplished by reversing the leads at the start winding. This is because the direction of rotation is determined by the magnetic field generated within the motor's windings, which is influenced by the phase of the electrical current flowing through them. By switching the connections at the start winding, you effectively change the phase relationship between the start and run windings, which results in reversing the magnetic field rotation and, consequently, the rotation direction of the motor shaft.

The other methods mentioned do not achieve this outcome. Simply turning the motor off and on will not change the direction of rotation; it will operate in the same direction as before. Changing the capacitor connection could potentially affect the motor's performance or starting capability, but it won't consistently change the direction. Altering the pulley size may influence the speed or load on the motor, but it does not affect the rotation direction of the motor itself.