I just bought a 85' Honda Magna v45, the clutch went out instantly

I took apart the hydraulic assembly. I pulled off the boot, then pulled out the plunger, and spring. Do you think if I replace that assembly it would fix my problem. I mean took a look at it all, and it appears in great shape, but i still do no have pressure when I press. Because I put it all back together and i have no change. I didn't replace it just took it apart, inspected it, cleaned it, and put it back together. I am asking because I am not sure what the diaphragm is.

Thank you. The trouble was not at all a faulty part, I just needed to pressurize the line. Simple fix, not money needed, thank god I spent every dime I had to buy this bike. Thank you all the same.

In order to re-pressurize your line, bleed it well first. After you bleed it, close the valve totally. Then you clamp a pair of needle nose vise grips on the hose about 3 inches away from the master cylinder, but make sure you don't tear through the line. The vise grips clamped well enough, it should stop the flow or fluid. Then squeeze the clutch lever. Yes I know, with the vise grips on there you can hardly squeeze the lever. When you squeeze the lever, and it stops, release the grips. In doing so you push fliud into the line. But make sure the cylinder tank is full. Once you let go of the lever, the plunger assembly inside the cylinder will stop any fluid from being forced back into the cylinder from the line. Put the grips back on and repeat about 20 or 30 times. No kiddin', it took me forever. If you keep doing it, you will eventually feel the lever get stiffer, til' finally, you have a clutch. It will seem as if it is not working, just keep at it til' you have preasure. It works.