Special rubber washer

Hi just wondering how important is it to replace the small rubber washer on the rear caliper… sits between the to halves

It seals the two halves and also the port for the brake fluid to the second piston…so quite important. CSMNL has a couple in stock…5 Euro’s I believe. I bought one a few months ago from them. Many years ago on another R I actually used a thick section nitrile O-ring which has a good amount of “pinch”…worked fine.

Smithy.

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Okay, thanks for the advice again… :+1: