[tony zambos]

John,
If my memory severs my right, there should be a metal washer under the bleeder plug. The washer could be missing. If that’s not the case, try a rubber O-ring. Carefully make sure there is no debris trapped under the bleed screw.

[John Baker]

Thanks Tony, there is a washer, but I’ll definitely try the O-ring.  I forgot to mention, but the screw never sits tight, so I’m thinking it could be stripped threads, not sure if it is the plug or if it is the threads on the actual master cylinder.

[Walt Gifford]

Do NOT use an O-ring under the plug. It is not designed for an O-ring and may not hold the pressure. You can’t tighten the plug down properly with an O-ring and it could vibrate loose. Anyone who is doing this is living on borrowed time.

Gif

[John Baker]

Guess I won’t try the O ring… considering it won’t tighten, is there the possibility that the master cylinder is toast, or could I fix it somehow?

[Walt Gifford]

The only thing you could do is go up in size and make a new plug. 12mm?

[Dan Brown]

John, that plug should screw in tight, and has a copper sealing washer underneath it. Look at the threads on the plug and see if they look stripped, hopefully its the plug and not the master cylinder.

Dan

[John Baker]

I’ll take a look when I get home, but if the screw is not stripped, then my options are to get a slightly bigger plug and drill it out or buy a new master cylinder?

[John Baker]

I checked the threads on the plug and they seemed ok, but they were definitely stripped on the master cylinder.  So what are my options now?  I really appreciate all the help.

[Walt Gifford]

http://www.accelerationkarting.com/rrmastercylinder.aspx

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