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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Embarrassing Brake Squeal. 8" VOC Brakes.
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<blockquote data-quote="davidd" data-source="post: 142030" data-attributes="member: 1177"><p>Dave Tompkins had 8" brakes that squealed. I slipped some fuel line over the springs and it may have helped. Mike Hawthorne had 8" brakes that squealed, but he ignored it. Ignoring it is fine as long as the vibration does not beak the springs. I lock wired Dave's spring to corral the parts if they broke.</p><p></p><p>Brake linings are hygroscopic and the moisture will cause squealing until the lining heats up. The lining in Vincents do not heat up unless you are very hard on them. On Dave's bike, It became a moot point as I replaced the brake shoes as well as the linings. I decided later that I would also switch to grooved linings going forward. Dick Hunt recommended grooved linings to prevent tram-lining and to remove debris.</p><p></p><p>Chamferring the leading edges can also help. When linings are new they are very unstable and they wobble around wildly. Chamferring the leading edge stiffens the lining by taking off material that would otherwise vibrate and squeal. As the lining wears you do not have to keep chamfering the leading edge because the lining becomes thinner due to the wear and becomes stiff enough to resist vibrating.</p><p></p><p>I think all the responses have been good including Mark's discussion about bedding in.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 142030, member: 1177"] Dave Tompkins had 8" brakes that squealed. I slipped some fuel line over the springs and it may have helped. Mike Hawthorne had 8" brakes that squealed, but he ignored it. Ignoring it is fine as long as the vibration does not beak the springs. I lock wired Dave's spring to corral the parts if they broke. Brake linings are hygroscopic and the moisture will cause squealing until the lining heats up. The lining in Vincents do not heat up unless you are very hard on them. On Dave's bike, It became a moot point as I replaced the brake shoes as well as the linings. I decided later that I would also switch to grooved linings going forward. Dick Hunt recommended grooved linings to prevent tram-lining and to remove debris. Chamferring the leading edges can also help. When linings are new they are very unstable and they wobble around wildly. Chamferring the leading edge stiffens the lining by taking off material that would otherwise vibrate and squeal. As the lining wears you do not have to keep chamfering the leading edge because the lining becomes thinner due to the wear and becomes stiff enough to resist vibrating. I think all the responses have been good including Mark's discussion about bedding in. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Embarrassing Brake Squeal. 8" VOC Brakes.
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