Recently acquired a cg125 engine too use as a spare for my cd200. The strange thing is that it has a twin port for the single cylinder.

Had the head off and its just a single exhaust valve splitting at the outlets.

Found out the engine was in a pioneer nevada 125. But it is definitely a honda bottom end, the generator and all the casings have honda logos engraved in them.

Did honda make a twin port cg125 or has it had a chinese head put on the cg 125 bottom end?