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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Hydraulic drum brakes
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<blockquote data-quote="peterg" data-source="post: 8965" data-attributes="member: 446"><p>Howdy clevtrev,</p><p> </p><p>Thankfully not mine and thinking cap still relegated to the shelf collecting dust.</p><p> </p><p>At this risk of being overly verbose...and acknowledged bad habit, didn't want to mention circumstance of flexing backing plates, etc. But at a recent very large vintage event over here observed a machine with the rear brake arms standing straight up at rest (I'm a strong proponent of the pull-towards-the pivot not away for safe leverage multiplication, especially on weak single leading shoe types) and couldn't resist giving the lever a prod with my foot. Both backing plate cocked noticeably to one side.</p><p> </p><p>And Tom, agree with you on TLS, some are almost too good to a fault as far as self servo action. Let the shoes on the front of a /2 wear to thin and as mentioned previously regarding leverage rise with shoe application/drum contact angle compared to shoe pivot location, they become grabby to the point of being unsafe.</p></blockquote><p></p>
[QUOTE="peterg, post: 8965, member: 446"] Howdy clevtrev, Thankfully not mine and thinking cap still relegated to the shelf collecting dust. At this risk of being overly verbose...and acknowledged bad habit, didn't want to mention circumstance of flexing backing plates, etc. But at a recent very large vintage event over here observed a machine with the rear brake arms standing straight up at rest (I'm a strong proponent of the pull-towards-the pivot not away for safe leverage multiplication, especially on weak single leading shoe types) and couldn't resist giving the lever a prod with my foot. Both backing plate cocked noticeably to one side. And Tom, agree with you on TLS, some are almost too good to a fault as far as self servo action. Let the shoes on the front of a /2 wear to thin and as mentioned previously regarding leverage rise with shoe application/drum contact angle compared to shoe pivot location, they become grabby to the point of being unsafe. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Hydraulic drum brakes
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