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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: 78250" data-attributes="member: 456"><p>Someone might like to check my figures. I have worked out the installed total spring force and the maximum spring force for both of Martyn's and Greg's bikes using the figures they have given above. I have assumed that the installed spring height is 13.5" and the fully compressed spring height is 10.5". For Martyn's Comet I make his set up the equivalent of two 42 lbs/inch springs installed with 2" of preload and for Greg's twin I make that the equivalent of two 46 lbs/inch springs with two inches of preload. Both bikes have Greg's ball race modification, Chris, who weighs more than they do, found that 36 lbs/inch spring with 3" of preload to be suitable when he used Oilite bushes and with needle roller bearings installed at the rear of the lower link this now needs either more damping or stronger springs. If these figures are correct then it seems that we are homing in an acceptable solution.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 78250, member: 456"] Someone might like to check my figures. I have worked out the installed total spring force and the maximum spring force for both of Martyn's and Greg's bikes using the figures they have given above. I have assumed that the installed spring height is 13.5" and the fully compressed spring height is 10.5". For Martyn's Comet I make his set up the equivalent of two 42 lbs/inch springs installed with 2" of preload and for Greg's twin I make that the equivalent of two 46 lbs/inch springs with two inches of preload. Both bikes have Greg's ball race modification, Chris, who weighs more than they do, found that 36 lbs/inch spring with 3" of preload to be suitable when he used Oilite bushes and with needle roller bearings installed at the rear of the lower link this now needs either more damping or stronger springs. If these figures are correct then it seems that we are homing in an acceptable solution. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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