1984 ZN1100 Rear Brake Problems

The rear brakes on my bike keep partially locking up when they get hot.

I rebuilt the caliper and put a new piston in it. Installed new pads and greased the the caliper guides.

I have bled the brakes repeatedly.

My next step is to rebuild the master cylinder. If anyone knows somewhere that has a rebuild kit in stock let me know.

Is there anything else I need to check?

either brake line is collapsing or the vent in the master is clogged

Maybe www.partsnmore.com has parts that will fit your bike....

It was the vent hole. I thought it was clear when I cleaned out the MC but I was mistaken.

Thanks