Purpose for Change Clutch

I have a 2000 TRX350FE. I can see by looking in the service manual that it has two clutches. One is a centrifugal clutch, and the other is a change clutch. I can understand the purpose for the centrifugal clutch, as it automatically disengages drive power at low RPM during vehicle stop, and then reconnects drive power as you add throttle to get going again. However, the purpose of the change clutch is not clear to me. When I look at how that clutch is constructed, I see that it is very similar to other Honda clutches that are engaged/disengaged through the use of a clutch lever. In the case of my TRX350FE, there is no clutch lever, so I would like to better understand how the change clutch comes into play and how it is engaged/disengaged. Presumably its function is somehow tied to changing gears, thus the reason for naming it the change clutch.

Any insight that you can provide as to the functionality of the change clutch is appreciated.

-Ken