Clutch and Brake master cylinder spring cup

[GRobinson]

Hi, I'm re building a pair of clutch and brake master cylinders at present. I've stripped everything down, cleaned the bores which were really good and fitted rebuild kits that I bought from TR Shop. The clutch cylinder went together fine but there's a problem with what I believe is called the spring cup (see photo) that fits over the end of the piston and is secured by a spring clip that holds it in place. The problem I have is that I think its become corroded and the circular flange on the end of the plunger no longer engages in the small circular hole at the end of the cup and keeps popping out. In short therefore, I need a replacement but from what I can see, its no longer available from the usual outlets but I thought someone out there may have found a supplier or may be able to help in some other way.

The image I've attached is just for illustration purposes (I think its from a motorbike actually) but I thought it may help to explain my problem as I can't find a part number either.

Many thanks

Graeme

[Ralph Whitaker]

Think you will have to buy another cylinder to dismantle for parts.

Ralph