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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Trevor Southwell re brakes
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<blockquote data-quote="fogrider" data-source="post: 177646" data-attributes="member: 2655"><p>Clevtrev, maybe I did'nt explain my idea too well, the theory was that turning the shoes , without, say, the H48 caps, and turning the pivot end of the lining somewhat under drum size, operating the cam with the H48's shims back IN ,would put the cam end in contact first, even out wear and give full contact sooner. It would have to be a small difference though and linings chamfered for the bedding in miles. The pivot's the pivot so the end result after use could be just the same ! Just a theory.</p><p></p><p>Vibrac, I'm absolutely certain that all the work involved in moving the pivots 1mm would have no change in brake performance what so-ever !</p><p>I rather think that turning oversize linings to drum size and removing any flex/sponge/etc is going to be as good as it gets. The big issue remains - what linings to select ? Sure, the woven stuff with brass wire in has lots of bite but as far as I know woven can't be turned without the weave being damaged. They don't give any real fade resistance, apparently, more suitable for lighter bikes. I enquired about that stuff, its' origin is for winch drum brakes which require lots of bite and holding power but don't need much anti-fade.</p><p></p><p>I found the Questmead receipt for the Mintex M24 equivalent - they called it 242. Expensive, but my sons' touring twin will chirp its front tyre with modern Bridgestones on it. ( If need be ). I think my B twin will be wearing it next year.</p></blockquote><p></p>
[QUOTE="fogrider, post: 177646, member: 2655"] Clevtrev, maybe I did'nt explain my idea too well, the theory was that turning the shoes , without, say, the H48 caps, and turning the pivot end of the lining somewhat under drum size, operating the cam with the H48's shims back IN ,would put the cam end in contact first, even out wear and give full contact sooner. It would have to be a small difference though and linings chamfered for the bedding in miles. The pivot's the pivot so the end result after use could be just the same ! Just a theory. Vibrac, I'm absolutely certain that all the work involved in moving the pivots 1mm would have no change in brake performance what so-ever ! I rather think that turning oversize linings to drum size and removing any flex/sponge/etc is going to be as good as it gets. The big issue remains - what linings to select ? Sure, the woven stuff with brass wire in has lots of bite but as far as I know woven can't be turned without the weave being damaged. They don't give any real fade resistance, apparently, more suitable for lighter bikes. I enquired about that stuff, its' origin is for winch drum brakes which require lots of bite and holding power but don't need much anti-fade. I found the Questmead receipt for the Mintex M24 equivalent - they called it 242. Expensive, but my sons' touring twin will chirp its front tyre with modern Bridgestones on it. ( If need be ). I think my B twin will be wearing it next year. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Trevor Southwell re brakes
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