Declutch shaft bearing: when working, the force of the clutch pedal will be transmitted to the declutch shaft bearing, and the bearing moved to the center of the clutch platen, then the platen will be pus away from the clutch, which will be departed from the flywheel. When the clutch pedal is off, the spring pressure inside the platen will push the platen to the clutch, and this departed the clutch from the bearing, then completed a working cycling.