the intake is neither fed directly into one side port, or blocked by the crank in the other 'case'. the way a two stroke engine works is the charge is sucked in to the case as the piston goes up compresses the previous charge while the transfer/exhaust ports are blocked off, makes its round in there lubing everything up, and gets pumped up through the transfers as the piston goes down, during which time the intake is either blocked by the piston, crank, or reeds, it is never going directly from intake to transfer ports.