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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Stripped Splines on Kickstart Shaft and Lever (Weep)
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<blockquote data-quote="ClassicBiker" data-source="post: 164074" data-attributes="member: 1632"><p>Actually back in the 80s my father bought a brand new kick start shaft and kick start lever from one of the well know suppliers and after three kicks it stripped, in spite of being tightened right up. So he made up a rather large fitting and pinned it to the stripped shaft. That lasted for a few years, till the shaft snapped on me. So I have no faith in the fine splines on the Vincent. The spines on my unit Triumph 500 are far courser as are the splines on my 125 Yamaha. My answer to the stripped splines was to make my own kick start shaft from 4130, 0.25" longer to clear the exhaust. I positioned and marked where the lever would be most comfortable for myself. I then put shim stock around shaft placed the lever back on and drilled two 0.1875" holes parallel to the axis of the shaft half in the lever half in the shaft at what would be top and bottom when on the bike and a further 0.25" hole at what would be the rear. I then hardened the shaft and installed on the bike and placed dowel pins in the holes. When clamped down there is no way it is going to move.</p><p>Perhaps what is available as replacement parts now is better than it was in the 80s, but back then it was rubbish.</p><p>Steven</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 164074, member: 1632"] Actually back in the 80s my father bought a brand new kick start shaft and kick start lever from one of the well know suppliers and after three kicks it stripped, in spite of being tightened right up. So he made up a rather large fitting and pinned it to the stripped shaft. That lasted for a few years, till the shaft snapped on me. So I have no faith in the fine splines on the Vincent. The spines on my unit Triumph 500 are far courser as are the splines on my 125 Yamaha. My answer to the stripped splines was to make my own kick start shaft from 4130, 0.25" longer to clear the exhaust. I positioned and marked where the lever would be most comfortable for myself. I then put shim stock around shaft placed the lever back on and drilled two 0.1875" holes parallel to the axis of the shaft half in the lever half in the shaft at what would be top and bottom when on the bike and a further 0.25" hole at what would be the rear. I then hardened the shaft and installed on the bike and placed dowel pins in the holes. When clamped down there is no way it is going to move. Perhaps what is available as replacement parts now is better than it was in the 80s, but back then it was rubbish. Steven [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Stripped Splines on Kickstart Shaft and Lever (Weep)
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