Why does the Toyota 4EFE engine have 3 Allen Heads in the middle of it? The Cylinder head will not remove from the block. Do these Allen Heads need to be removed to separate the cylinder head?
That engine is used in the Starlet and non-US market small cars. Not sure about a motorcycle.
In any case, they are merely gasketed plugs on top of a center water gallery, and should have nothing to do with removing the head.
Assuming all head bolts are off and the timing gear clear, perhaps some light smacks with a quality dead-blow hammer will break loose the "glue" of corrosion that is keeping the head stuck to the gasket and the gasket to the block.