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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Suspension - please explain.
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<blockquote data-quote="Albervin" data-source="post: 121425" data-attributes="member: 586"><p>I assume you now have spacers between the springs and damper on the lower mount. When you rebuilt the damper what oil did you use? This can be critical to a good set-up. Most suspension tuners say " soft springs and firm dampers" and that has worked for me for forty years. The friction seat stays are a hangover from Series A and B bikes. Light machine oil on the damping fabric stops squeak, judders and still gives a smooth damping for the passenger. You say you have 1/2" each end of bump stop. That doesn't sound right. There should be a bump stop at the top of the piston but not 1/2". With modern oils I use a 3/8" Nylothane bump stop. IF the damper is compressing to full travel then you have to do a few things; but one at a time. First I would put heavier oil in the damper. Then I would think about changing one spring to a heavier one. Before doing anything you need to measure suspension sag; both static and with you sitting on the bike. This is critical for a comfortable ride. Cable ties are your friend here. Happy days.</p></blockquote><p></p>
[QUOTE="Albervin, post: 121425, member: 586"] I assume you now have spacers between the springs and damper on the lower mount. When you rebuilt the damper what oil did you use? This can be critical to a good set-up. Most suspension tuners say " soft springs and firm dampers" and that has worked for me for forty years. The friction seat stays are a hangover from Series A and B bikes. Light machine oil on the damping fabric stops squeak, judders and still gives a smooth damping for the passenger. You say you have 1/2" each end of bump stop. That doesn't sound right. There should be a bump stop at the top of the piston but not 1/2". With modern oils I use a 3/8" Nylothane bump stop. IF the damper is compressing to full travel then you have to do a few things; but one at a time. First I would put heavier oil in the damper. Then I would think about changing one spring to a heavier one. Before doing anything you need to measure suspension sag; both static and with you sitting on the bike. This is critical for a comfortable ride. Cable ties are your friend here. Happy days. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Suspension - please explain.
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