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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="timetraveller" data-source="post: 107560" data-attributes="member: 456"><p>Bernd, once you have had more chance to try it then perhaps the same idea as Robin has used, fitting a short inner spring, might be what is needed. The overall length of the 36, 33 and 30 lbs/inch springs is 16.5" (419mm). They are all installed with a length of 13.5" (343 mm) so for the smaller diameter springs to come into use after 1.5" (38 mm) of movement the new springs would have to be about (343-38=305mm). This way one might get the advantage of the easy movement over small bumps but prevent the bottoming out over large bumps. Does any one know the length and spring rate of the original inner springs. If we have that then I can work out what rate the new springs would have to be to get the same effect as Robin.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 107560, member: 456"] Bernd, once you have had more chance to try it then perhaps the same idea as Robin has used, fitting a short inner spring, might be what is needed. The overall length of the 36, 33 and 30 lbs/inch springs is 16.5" (419mm). They are all installed with a length of 13.5" (343 mm) so for the smaller diameter springs to come into use after 1.5" (38 mm) of movement the new springs would have to be about (343-38=305mm). This way one might get the advantage of the easy movement over small bumps but prevent the bottoming out over large bumps. Does any one know the length and spring rate of the original inner springs. If we have that then I can work out what rate the new springs would have to be to get the same effect as Robin. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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