Topic: Rear master cylinder questions....

[J.Webster Designs]

hey guys, I was working on my rear master cylinder tonight that was supposed to be rebuilt when the PO had the bike. I noticed that the rear brake line is new. and the rear master looks pretty clean inside. but the question that i have is about the plunger rod. does it have a joint on the inside so that it can pivot? mine is able to pivot around and i am trying to figure out if this is normal or if this thing is going to leak like a siv when i get it back on the bike...

[BeSeeingYou]

 I think what you are calling the plunger rod is better described as the pushrod, the plunger being the part up inside the cylinder bore with the two seal caps and the spring.  The plunger and pushrod form a ball and socket type joint with the plunger being the socket and pushrod the ball.  The seal is above the socket on the plunger so this joint itself has no sealing function.  There is no physical connection, they just fit together and it allows a small amount of pivoting movement.  There should also be a large flat washer and c-clip on the pushrod to hold it all in place.  This picture shows the parts in order with the boot removed for clarity. 

[J.Webster Designs]

Thank you... That is exactly what i needed.