rear master cylinder

[jerry]

Hello
I am looking for a rear master cylinder for a 79 Honda cb750f and I cant seem to find one does anybody know where I could get one or know of another cylinder that could be used on this bike the bolt holes need to work
Thanks

[Re-run]

Do you need a whole master, or just a rebuild kit?

[jerry]

hello
I need the master cylinder itself the one I have was seized up and I was able to get it apart but the inside has a big scratch in it .
Thanks

[Re-run]

Well, you should look for a motorcycle salvage yard in your area. That is the best way to go.

Otherwise, ebay.
http://www.ebay.com/itm/Honda-1981-CB900F-Supersport-Rear-Brake-Master-Cylinder-CB1100F-CB750F-1982-1983-/181523077266?pt=Motorcycles_Parts_Accessories&hash=item2a439e5892&vxp=mtr
 Only 1 I found.

You also have 2 other options.

You can find a master from another bike and just fab a bracket to mount it. This probably wouldn't be too hard and would open up a wide range of masters. Something to consider.

Or you could attempt to fill the scratch with something resistant to brake fluid. A metal filler, jbweld might work. Then just smooth it out. If it doesn't work, not like you are out anything.

I would probably just get a rebuild kit and try that. Unless the scratch is REALLY deep, a rebuild might work just fine.

If you can, maybe get a pic of it and we can see the offending scratch.