Front brake master cylinder questions

[foxjohnc]

I changed from single to dual disk brakes on my front of my xj and in the process I changed to the master cylinder from my 650. I have torn it apart and cleaned the spooge hole many times with no luck and am getting tired of tearing it apart. I saw a m/c on ebay from an 80 something xs 1100 and they look exactly the same. Can someone look at this pic and verify what year and model xs 1100 it fits? I am going to order a rebuild kit for it and dont want to screw up.



Also, what size piston does it have and would it be appropriate for dual disks?

[randy]

From the looks of it, it's a 78-81 XS m/c. the size of the bore is embossed on the underside IIRC, it's 11/16 or something like that. Parts n more has the rebuild kits at a very reasonable price.

HTH

Randy

[bkr]

Front MC

Hey foxjohn When i changed my XJ system over i used the stock MC on the bike ,worked great.

[Underdog]

Partsnmore had them on BO when I did mine so I used the OE kit from Zanotti's. Partsnmore also show a complete master assm that some have reported to work good. Check the forums under brakes.

[foxjohnc]

Ok, I tore down my xj master cylinder to clean it while I have the time. I got it apart fine but i didnt notice the order and direction that certain parts came out. Can someone tell me how this thing is supposed to go together? I have the piston and a spring with a piece of rubber on the end. Which way is the rubber on the spring supposed to face? Toward the piston or toward the line exit?