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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Wheel rebuilding
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<blockquote data-quote="Tom Gaynor" data-source="post: 22524" data-attributes="member: 4034"><p>Something that came up at our lunch meeting today: contrary to popular opinion, the brake plates should NOT be a tight fit on the axle. If they can float radially, then the shoes will centre on the drum which is exactly what you want. If they are tight on the axle, then the drum has to wear the linings until they make maximum contact. As J Bickerstaffe once remarked, in that case the brakes are no sooner worn in than they start to wear out. I have a Guzzi 250, 8" brake, and it is clear that fit of the (steel) plate on the axles, and the nut on the outside, are designed to allow the plate to centre itself. It works. What is also important is that when the spindle is tightened there is a solid load path between the fork blades so that they don't close in. When I tried Lightning plates, in a vain effort to make what is effectively a 7" single leading shoe brake with a wide lining better, I had to put spacers in BEHIND the plates. Twin brakes do not double braking power, they double fade resistance...but my suspension still worked...</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 22524, member: 4034"] Something that came up at our lunch meeting today: contrary to popular opinion, the brake plates should NOT be a tight fit on the axle. If they can float radially, then the shoes will centre on the drum which is exactly what you want. If they are tight on the axle, then the drum has to wear the linings until they make maximum contact. As J Bickerstaffe once remarked, in that case the brakes are no sooner worn in than they start to wear out. I have a Guzzi 250, 8" brake, and it is clear that fit of the (steel) plate on the axles, and the nut on the outside, are designed to allow the plate to centre itself. It works. What is also important is that when the spindle is tightened there is a solid load path between the fork blades so that they don't close in. When I tried Lightning plates, in a vain effort to make what is effectively a 7" single leading shoe brake with a wide lining better, I had to put spacers in BEHIND the plates. Twin brakes do not double braking power, they double fade resistance...but my suspension still worked... [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Wheel rebuilding
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