Actually, it's a little different, because the auto clutch engine has a centrifugal clutch in addition to the change or shift clutch. But I agree that it would work if you could figure out a way to engage/disengage the shift clutch. You would have to do away with the internal clutch lever, the clutch free play adjusting screw, the ball retainer, and the lifter cam. You would have to have a mechanism to push in on the clutch lifter plate and bearing when you pulled the lever. You would need a lever and shaft setup like on a manual clutch model. You would have to alter the side cover to incorporate this, which in my opinion, might be hard to do. Also, remember that when you let out on the clutch lever, the centrifugal clutch would already have to be engaged by engine speed, before the shift clutch can engage and pull, but I don't think that would pose a problem.
Anyway, good luck and let us know how it goes.