Master Cylinder Repair Kit, 16mm 74-75 are No Longer Available!
The old ATE master cylinders, being out of sight and out of mind under the fuel tank, were often neglected. They are made of cast iron and susceptible to corrosion.
There were three sizes. The size should be stamped on the body of the master cylinder. Locate that before ordering to ensure that you get the correct kit.
The 16mm was Equivalent to BMW part number 34 31 1 234 925