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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: 177588" data-attributes="member: 2655"><p>Interesting comments, from experience too. I have a magazine compilation of (British) sports model road tests. 25 bikes of the fifties and sixties plus one BMW R69. Bearing in mind my Highway code is early 90's - it states braking distance from 30mph = 30 ft.</p><p>Nearly all the bikes tested rated 29 ft, except the Vincent Black Shadow at 22.5 ft and a Comet 22ft. Only the BMW exceeds at 20ft but which has an 8" full width drum. Good engineering Erik !</p><p>Most of the 29ft brakes were considered by the testers to be good or excellent - which puts the Vincents in the better than excellent bracket, so as Monkeypants says, why are'nt they all now ?</p><p>The Black Shadow is JRO 102 and was tested when new, no wear or neglect ? Or factory selected bits, who knows ?</p><p></p><p>Years ago, I fitted an equivalent of Mintex M24 to my sons touring twin. Turned to size, but no other mods ( though it does have alloy back plates).</p><p>Those linings were very expensive, Questmead in the Bradford area. The guy told me to ensure they were properly bedded in and that the heat cycles were most important. I followed his instructions and they are damn good brakes.</p><p>I'm sure the racers on here know more about the heat cycle process. Questmead even offer to do that to the linings before delivery - extra cost, err....no thanks !</p><p>I rang them recently and they no longer do that material and recommended something else. Maybe in the spring I ought to shell out for their alternative. Maybe.</p></blockquote><p></p>
[QUOTE="fogrider, post: 177588, member: 2655"] Interesting comments, from experience too. I have a magazine compilation of (British) sports model road tests. 25 bikes of the fifties and sixties plus one BMW R69. Bearing in mind my Highway code is early 90's - it states braking distance from 30mph = 30 ft. Nearly all the bikes tested rated 29 ft, except the Vincent Black Shadow at 22.5 ft and a Comet 22ft. Only the BMW exceeds at 20ft but which has an 8" full width drum. Good engineering Erik ! Most of the 29ft brakes were considered by the testers to be good or excellent - which puts the Vincents in the better than excellent bracket, so as Monkeypants says, why are'nt they all now ? The Black Shadow is JRO 102 and was tested when new, no wear or neglect ? Or factory selected bits, who knows ? Years ago, I fitted an equivalent of Mintex M24 to my sons touring twin. Turned to size, but no other mods ( though it does have alloy back plates). Those linings were very expensive, Questmead in the Bradford area. The guy told me to ensure they were properly bedded in and that the heat cycles were most important. I followed his instructions and they are damn good brakes. I'm sure the racers on here know more about the heat cycle process. Questmead even offer to do that to the linings before delivery - extra cost, err....no thanks ! I rang them recently and they no longer do that material and recommended something else. Maybe in the spring I ought to shell out for their alternative. Maybe. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Trevor Southwell re brakes
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