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Message: <blockquote data-quote="OldMachinist" data-source="post: 41564" data-attributes="member: 437"><p>Likely the noise is part of the broken parking brake. It's located in the center of the chaincase near where your feet would be. It's possible that it may not cause any problem but in the worse case what ever is clicking could lock up the drive system at the worse possible time. I've uploaded the 743 service manual here <a href="http://www.mediafire.com/?wk8boxnybvnkc" target="_blank">http://www.mediafire.com/?wk8boxnybvnkc</a> The drive system section covers the parking brake.</p></blockquote><p></p>