If the unit is not working properly, you can remove the circlip (2) and then extract the free wheel (1) from the flange.
When refitting the free wheel, follow the arrow which indicates the rotation direction of the engine.
Check that the gears which transmit the motion from the starter motor to the free wheel are in good condition.
Caution! When refitting the parts of the free wheel, only use engine oil and not grease which could affect the functioning of the free wheel.