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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rear seat stays friction
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<blockquote data-quote="Simon Dinsdale" data-source="post: 92809" data-attributes="member: 58"><p>Just been rebuilding a set of seat stays for my Shadow which got me thinking (I know that's dangerous). On the series B's without a rear damper these are the only rear suspension damping which can be adjusted by the damper knobs and was the original reason for their design. On a series C the rear suspension has a hydraulic damper so the seat stays should really be set so they are free to move with no friction, but not too free so they move sideways. If they are set too tight the friction in the seat stays will affect the operation of the hydraulic damper in a similar way to what Greg found the friction in the front suspension lower link eccentrics affects the front suspension. So has anybody considered replacing the friction material in the seat stays drums with a bronze bush on a series C and lock the damper knob adjustment or does everybody just set them to minimum friction possible without been too loose?</p><p>I remember years ago with my Rapide when I changed to a fully floating seat / pannier frame discovering that the bike suddenly had rear suspension. The only change to the suspension was the seat stays were no longer been used so were not stiffening the suspension up.</p><p>To me the seat stays appear to be a leftover design from before the hydraulic dampers were used and if you intend to use a decent damper like the Avo then you don't want the seat stays interfering with the hydraulic damper operation.</p><p></p><p>Reason for asking is I've not used seat stays for the last 25 years.</p><p>Simon</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 92809, member: 58"] Just been rebuilding a set of seat stays for my Shadow which got me thinking (I know that's dangerous). On the series B's without a rear damper these are the only rear suspension damping which can be adjusted by the damper knobs and was the original reason for their design. On a series C the rear suspension has a hydraulic damper so the seat stays should really be set so they are free to move with no friction, but not too free so they move sideways. If they are set too tight the friction in the seat stays will affect the operation of the hydraulic damper in a similar way to what Greg found the friction in the front suspension lower link eccentrics affects the front suspension. So has anybody considered replacing the friction material in the seat stays drums with a bronze bush on a series C and lock the damper knob adjustment or does everybody just set them to minimum friction possible without been too loose? I remember years ago with my Rapide when I changed to a fully floating seat / pannier frame discovering that the bike suddenly had rear suspension. The only change to the suspension was the seat stays were no longer been used so were not stiffening the suspension up. To me the seat stays appear to be a leftover design from before the hydraulic dampers were used and if you intend to use a decent damper like the Avo then you don't want the seat stays interfering with the hydraulic damper operation. Reason for asking is I've not used seat stays for the last 25 years. Simon [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rear seat stays friction
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