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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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<blockquote data-quote="Martyn Goodwin" data-source="post: 78051" data-attributes="member: 2433"><p>I do not understand why you say there is a need for an initial force of 206 Lbs. or at what point in the suspension travel you are measuring it. </p><p></p><p>For my Comet, fitted with the (I must say fantastic) new headstem, the front of the bike is weighs 184 Lbs measured by putting scales UNDER the front tyre. To get to the base unsprung weight it necessary to remove the weight of those parts not supported by the front springs being the complete front wheel assembly including brakes, the Girduralic fork blades, the headlamp assembly and the speedo. I have NOT weighed these bits YET and for now have estimated them at 50 Lbs in all, giving an unsprung weight sans rider of 134 Lbs. </p><p></p><p>I weigh 190 Lbs and assuming 40% weight bias to the front then I will be adding 76 Lb to the front wheel unsprung weight, giving a total unsprung weight on the front end with me aboard of 210 lbs. Yes this is a bit different to the figure I used in my earlier post.</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 78051, member: 2433"] I do not understand why you say there is a need for an initial force of 206 Lbs. or at what point in the suspension travel you are measuring it. For my Comet, fitted with the (I must say fantastic) new headstem, the front of the bike is weighs 184 Lbs measured by putting scales UNDER the front tyre. To get to the base unsprung weight it necessary to remove the weight of those parts not supported by the front springs being the complete front wheel assembly including brakes, the Girduralic fork blades, the headlamp assembly and the speedo. I have NOT weighed these bits YET and for now have estimated them at 50 Lbs in all, giving an unsprung weight sans rider of 134 Lbs. I weigh 190 Lbs and assuming 40% weight bias to the front then I will be adding 76 Lb to the front wheel unsprung weight, giving a total unsprung weight on the front end with me aboard of 210 lbs. Yes this is a bit different to the figure I used in my earlier post. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modified Steering Stem
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