its not 2 + 4 = 6 lar
its sumting like a Vtwin, gotta have 2 or 4 crankcases which have 2
equal no. of 2 stroke n 4 stroke engine.
the 2 stroke engine acts like a power valve, once power is needed,
the bike uses the 2 stroke engine. once a speed is maintained, 4
stroke is used for best fuel effiency. 2t can pour into a tank for
the 2 stroke engine itself, engine oil is totally used for gears n
the 4 stroke engine...