| 'ang on 'ere, gents.........
That roll pin is to preclude you from installing the wrong bore size wheel 
cylinder, or rather to help in identifying them. There is a group of 
similar looking wheel cylinders used on various BCs, whose bore diameter 
differs, but externally look identical. The position of the roll pin 
relative to the line inlet is/was a way to differentiate amongst them so 
the correct size cylinder would be installed. I suppose a tapped screw hole 
would do as well, but I suspect that folks would not install the screw if 
it didn't line up properly with the backing plate hole resulting in some 
liability.
         I endorse David's circlip method, too. Why not do brakes properly?
         Peter C.
=====
At 06:59 PM 3/8/2004, John D'Agostino wrote:
>Gee, I thought the expanding ciclips were the originals. Silly me. The 10-32
>screw seem like a good idea though. They should have done it right and
>bolted it on in the first place...
>Concours, what's that?
>
>J
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