I guess I should have said in my mind’s eye the intake would still have its own reeds or piston ported.
The piston reeds would only replace the transfer ports function.
I, in my limited imagination of such a thing, think that the intertia of the petals as the piston transitions from down stroke, to full stop, then up stroke would want to hold them shut during the period that they need to flow.
Perhaps V-reeds aimed up would be a better design. I know, without experimenting, that the cost and complication wouldn’t make sense for any normal application. But for “the most powerful 50cc engine” it might be worth a try.