I had to replace the solenoid on my CB750K2 and for a quick fix took the one of my CB750K4 (which worked very well and fixed the problem). I then got another solnoid off a CB750K6 to replace the K4 one and found it had changed! The K6 has the male/female connectors (for the yellow/red wire and black wire) the opposite way to the K2 -K4 solenoids. Anyone know why this is??! Very strange.....
cheers
Andy in Boston