|The BEFORE photo of the Master Cylinders|
|Brake and Clutch Master Cylinders out and cleaned up a bit|
|Tapered top and hexagon top master cylinders.|
Both the clutch and brake cylinders have a bore of 0.75". Later cars had all sorts of variations and swapped bore sizes back and forwards. The same outwards appearance could range from 0.75" through 0.70" to 0.625". There are also two variations in the main seal style. These early ones use a ring seal and a cup seal, but later they converted to two ring seals. Luckily seal kits are still readily available, although the brake one is harder to find in 0.75" than the clutch. I got mine from Somerford Spares in the the UK.
Unfortunately the metal cap for the brake cylinder is badly corroded and falling apart. These are virtually impossible to find replacements for, but are essential because they are a unique feature of the older Minis. There have been a few sold on ebay in recent times for insane prices, but luckily I managed to 'win' a single one a few years ago, that is in pretty good shape and although it was expensive was way under what some are selling for. The clutch one is a bit corroded but I think it will be servicable.