Topic: Is the bottem end (crank & con rods) from CB500K interchangable witha 78 CB550K

[Treeguy]

I am wondering if the cranks & con rods from a cb500k are interchangable with my '78 cb550k? I see a cheap replacement but not sure if they are the same. I think they are the same since they just bored out the 500 engine alittle to make it a 550 . . . any ideas ?? Drop a line thanks!   Shane