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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
alloy brake plates-differences?
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<blockquote data-quote="Tom Gaynor" data-source="post: 25177" data-attributes="member: 4034"><p>I have PV brakes, and when I spun the wheel first I heard a singing noise. At first I thought this was the natural musicality of Dutchmen (I know they dance, why not sing too? OK, Nobby, joke...) then realised something was touching. It was the speedo gear kissing the return springs. What I did was take the speedo gear off and turn a 45 degree chamfer about 1/8" wide on the outside corner. Eureka! A tomb-like silence ensued. And the nylon (on my bike) gear still has about 80% engagement. </p><p>Getting two bites at the cherry, I went from steel plates to ally Lightning ones, and the brakes were every bit as bad as they had been before. I won't bore you with the skimmed drums, oversize linings turned to suit, AM4 (green) linings, single cable, twin cable experiments I tried. Just note that once I fitted the PV brakes, brakes disappeared off the "things to do" list. Later I realised that <em>unless the brakes are perfectly aligned and centred</em>, the very LAST thing wanted is a stiff brake plate, because a stiff plate prevents the shoes aligning and centreing themselves. </p><p>I think I did have to put 1 mm spacers inside the PV plates (as I did the Lightning plates) to stop them touching the drum, but since I haven't looked at them since the last time I renewed the front tyre, can't remember! Which is how I like it...</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 25177, member: 4034"] I have PV brakes, and when I spun the wheel first I heard a singing noise. At first I thought this was the natural musicality of Dutchmen (I know they dance, why not sing too? OK, Nobby, joke...) then realised something was touching. It was the speedo gear kissing the return springs. What I did was take the speedo gear off and turn a 45 degree chamfer about 1/8" wide on the outside corner. Eureka! A tomb-like silence ensued. And the nylon (on my bike) gear still has about 80% engagement. Getting two bites at the cherry, I went from steel plates to ally Lightning ones, and the brakes were every bit as bad as they had been before. I won't bore you with the skimmed drums, oversize linings turned to suit, AM4 (green) linings, single cable, twin cable experiments I tried. Just note that once I fitted the PV brakes, brakes disappeared off the "things to do" list. Later I realised that [I]unless the brakes are perfectly aligned and centred[/I], the very LAST thing wanted is a stiff brake plate, because a stiff plate prevents the shoes aligning and centreing themselves. I think I did have to put 1 mm spacers inside the PV plates (as I did the Lightning plates) to stop them touching the drum, but since I haven't looked at them since the last time I renewed the front tyre, can't remember! Which is how I like it... [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
alloy brake plates-differences?
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