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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
G87/1 Kickstart Return Spring Replacement
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<blockquote data-quote="BigEd" data-source="post: 141914" data-attributes="member: 161"><p>For what it is worth I had two springs break over a lot of miles. My guess is that the spring was stretched too far when at the bottom of the kickstart stroke. After the second one broke I fitted the loop from the end of the broken spring to the new spring to make it longer my theory being that if the spring was stretched less it was less likely to break. The (obvious?) downside is that the kickstart isn't held up to the stop quite so firmly but this didn't seem to have an adverse effect. How easy it is to be able to change the spring without removing the gear cover I can't comment on as it is something I have not tried.</p><p>The revised profile of the bend on the open end will most likely have improved things considerably.</p><p>I have now removed the kickstart and all the attendant parts so the chance of the return spring breaking is reduced to zero as I have an electric start fitted. The downside of this is the cost. A new spring is easy on the wallet but the electric start is easier on the leg and knee.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="BigEd, post: 141914, member: 161"] For what it is worth I had two springs break over a lot of miles. My guess is that the spring was stretched too far when at the bottom of the kickstart stroke. After the second one broke I fitted the loop from the end of the broken spring to the new spring to make it longer my theory being that if the spring was stretched less it was less likely to break. The (obvious?) downside is that the kickstart isn't held up to the stop quite so firmly but this didn't seem to have an adverse effect. How easy it is to be able to change the spring without removing the gear cover I can't comment on as it is something I have not tried. The revised profile of the bend on the open end will most likely have improved things considerably. I have now removed the kickstart and all the attendant parts so the chance of the return spring breaking is reduced to zero as I have an electric start fitted. The downside of this is the cost. A new spring is easy on the wallet but the electric start is easier on the leg and knee.;) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
G87/1 Kickstart Return Spring Replacement
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