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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: 103353" data-attributes="member: 456"><p>Ok. I have now weighed the forks. To make it clear these are lightened Grey Flash blades, upper link, a wheel, tyre and two disc brakes so no callipers etc. The weight is 19 kg, lets call that 20 and if there was a mudguard, stays, headlamp etc that would probably go up to 21-22. Removing 20 from the figures given above for the owner in Italy gives 53 kg bike only and 85 kg with him on it. 85 kg is 187 lbs so as there are two springs then 30 lbs/inch springs would need just over three inches of preload to compensate for that. That is proving too much for both Vibrac and our friend in Italy so what am I missing?</p></blockquote><p></p>
[QUOTE="timetraveller, post: 103353, member: 456"] Ok. I have now weighed the forks. To make it clear these are lightened Grey Flash blades, upper link, a wheel, tyre and two disc brakes so no callipers etc. The weight is 19 kg, lets call that 20 and if there was a mudguard, stays, headlamp etc that would probably go up to 21-22. Removing 20 from the figures given above for the owner in Italy gives 53 kg bike only and 85 kg with him on it. 85 kg is 187 lbs so as there are two springs then 30 lbs/inch springs would need just over three inches of preload to compensate for that. That is proving too much for both Vibrac and our friend in Italy so what am I missing? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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