as we know there're not enough room for the transferts on H2, so on KR the intakes and exhausts ports are not fixed at 90 ° compare to the crankshaft inside the crankcases but are nearly perpandicular to the crankshaft inside the crankcases. This helps a lot to have bigger rooms for the transferts ports.
Notice also that the intake ports are very closed from the bottom of the barrels this means the pistons at the bottom dead center are really on the bottom of the barrel sleeve. This explains why there is bridgeport on the intakes.
As you know Suzuki did the same on his GT 750 2 stroke
Notice also there're six studs on the exhausts side on which the engine is hoter so the barrel can be deformed and only four studs on the intakes side
