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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Clutch locking up
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<blockquote data-quote="greg brillus" data-source="post: 123320" data-attributes="member: 597"><p>Sounds like it........You could try machine a small amount off the inner face of the C3 or else remove the primary cover and the chain, chain wheel and crank sprocket assembly, and then trim the bushes..........Just for interests sake I think if the fit of the C3 on the mainshaft has any noticeable backlash on the spline, this will cause the C 20 nut to come loose again and again resulting in oil getting onto the clutch. You should be able to assemble the C3 through the chainwheel onto the mainshaft and tighten the C 20 nut fully and get at least 5 thou end float on the chainwheel itself. If this assembly is quite sloppy even if new bushes have been installed into the chainwheel hub, then the OD of the C3 is worn and should ideally be replaced. The problem with too much sloppiness in the chainwheel is it makes setting up the clutch quite difficult as every time you check for run-out on the outer pilot plate, something has changed and this is a pain.......Good luck with it all.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 123320, member: 597"] Sounds like it........You could try machine a small amount off the inner face of the C3 or else remove the primary cover and the chain, chain wheel and crank sprocket assembly, and then trim the bushes..........Just for interests sake I think if the fit of the C3 on the mainshaft has any noticeable backlash on the spline, this will cause the C 20 nut to come loose again and again resulting in oil getting onto the clutch. You should be able to assemble the C3 through the chainwheel onto the mainshaft and tighten the C 20 nut fully and get at least 5 thou end float on the chainwheel itself. If this assembly is quite sloppy even if new bushes have been installed into the chainwheel hub, then the OD of the C3 is worn and should ideally be replaced. The problem with too much sloppiness in the chainwheel is it makes setting up the clutch quite difficult as every time you check for run-out on the outer pilot plate, something has changed and this is a pain.......Good luck with it all. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Clutch locking up
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