Go back through have a look at the photos that you posted in the very beginning of your parts collection. They show the cutter clutch frame with a piece of wire attached to the centre arm. Note the attachment is via a couple of chain links. Attach this wire (or a fresh piece of the correct size to the arm on the cutter brake in the photo above. Again this is attached via a couple of chain links. Just copy the other end.
Can I get you to tell me the rear tyre size please?
