The flywheel assembly is actually two flywheels in one, which raises the inertial mass on both the engine and transmission. The PRIMARY and SECONDARY flywheels are connected by ARC COIL SPRING 1 and 2. This combination effectively dampers changes in engine speed before they are transmitted to the transmission.

Since there are ARC COIL SPRING 1 and 2 between the flywheels, none are used in the clutch disc, which lessens the inertial mass on the mainshaft. This reduction of the rotating inertial mass reduces the load on the synchro rings, allowing the transmission to shift smoothly. Also, the friction control plate is designed to reduce the noise when the engine starts and stops.