The 1939 parts book for B21 to B26 lists 65-3087 'leather gland' and 65-3088 'sprocket spring ring'. I'm guessing that these were fitted behind the gearbox sprocket perhaps to prevent grit etc flicking off the chain and getting behind the sprocket. These parts appear to be no longer available, but Draganfly shows a leather washer instead of the 'gland', available on back order.
Has anyone had any experience of these parts? Could a felt washer be a suitable replacement as fitted to many later models?
Has anyone had any experience of these parts? Could a felt washer be a suitable replacement as fitted to many later models?