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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Shoes and Linings
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<blockquote data-quote="davidd" data-source="post: 99115" data-attributes="member: 1177"><p>I think there has always been metal available in post war brake linings, particularly the higher friction ones. Many of the Ferodo materials that have been supplied for Vincents in the past have had metal in them. The metal in linings help them survive high heat as well as helping distribute the temperature faster through the brake shoes so there are fewer hot spots. </p><p></p><p>3920 is a popular lining used for many bikes. It often ends up in the rear brakes of racers because it is not the highest friction available, it is a medium high friction and will be less prone to locking up. There are very high friction linings that use modern materials like Kevlar and carbon that are good for 1900 degrees F. I suppose they will give you a warning when your brake shoes melt at 1200 degrees F. But, my point is there are materials much tougher than metal going into brake linings.</p><p></p><p>I think the real key is how they wear. Many brake reliners will know if a lining is tough or easy on drums. Unfortunately, you can get diverging opinions on the same lining. </p><p></p><p>Frankly, I am not concerned about the wear on drums. If you are getting a fantastic increase in stopping power and wearing your drums out at twice the rate, that is a winning combination in my book. The fact is owners do not seem to replace their drums due to wear very often and that says a lot. I have replaced car drums and rotors quite a few times in my life.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 99115, member: 1177"] I think there has always been metal available in post war brake linings, particularly the higher friction ones. Many of the Ferodo materials that have been supplied for Vincents in the past have had metal in them. The metal in linings help them survive high heat as well as helping distribute the temperature faster through the brake shoes so there are fewer hot spots. 3920 is a popular lining used for many bikes. It often ends up in the rear brakes of racers because it is not the highest friction available, it is a medium high friction and will be less prone to locking up. There are very high friction linings that use modern materials like Kevlar and carbon that are good for 1900 degrees F. I suppose they will give you a warning when your brake shoes melt at 1200 degrees F. But, my point is there are materials much tougher than metal going into brake linings. I think the real key is how they wear. Many brake reliners will know if a lining is tough or easy on drums. Unfortunately, you can get diverging opinions on the same lining. Frankly, I am not concerned about the wear on drums. If you are getting a fantastic increase in stopping power and wearing your drums out at twice the rate, that is a winning combination in my book. The fact is owners do not seem to replace their drums due to wear very often and that says a lot. I have replaced car drums and rotors quite a few times in my life. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Shoes and Linings
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