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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Early Twin Clutch
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<blockquote data-quote="Simon Dinsdale" data-source="post: 103689" data-attributes="member: 58"><p>Curiosity got to me so I just pulled the clutch. Found an early drum (photo 1) with the holes in the back and a different method of securing the shoes to the carrier which may expain what going on.</p><p>The shoes appear to be secured with a nut rather than a circlip. The nut has a thin washer / shim under the head which is what you may be refering to Craig. See photo 2.</p><p>Photo 3 shows it dismantled. The bolt is a std C4 and the pivot nut is what the clutch shoe pivots on. I suspect the shim is to stop the hex of the nut machining itself into the alloy shoe when the shoe pivots. I suspect the nut in the photo is an original C5 which was later replaced with the C5/1 & circlip.</p><p>Photo 4 & 5 are of the factory instruction sheets where they refer to this assembly.</p><p></p><p>So Craig you only need the shim / washer if you still have the earlier C5 nut arrangement and not the later C5/1 and circlip. The shim measures 1/2" id, 5/8" od and 30 thou thick.</p><p></p><p>I wll be upgrading this clutch to the later C5/1 when it goes back together.</p><p></p><p>Simon</p><p>[ATTACH]25606[/ATTACH][ATTACH]25607[/ATTACH][ATTACH]25608[/ATTACH][ATTACH]25609[/ATTACH][ATTACH]25610[/ATTACH]</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 103689, member: 58"] Curiosity got to me so I just pulled the clutch. Found an early drum (photo 1) with the holes in the back and a different method of securing the shoes to the carrier which may expain what going on. The shoes appear to be secured with a nut rather than a circlip. The nut has a thin washer / shim under the head which is what you may be refering to Craig. See photo 2. Photo 3 shows it dismantled. The bolt is a std C4 and the pivot nut is what the clutch shoe pivots on. I suspect the shim is to stop the hex of the nut machining itself into the alloy shoe when the shoe pivots. I suspect the nut in the photo is an original C5 which was later replaced with the C5/1 & circlip. Photo 4 & 5 are of the factory instruction sheets where they refer to this assembly. So Craig you only need the shim / washer if you still have the earlier C5 nut arrangement and not the later C5/1 and circlip. The shim measures 1/2" id, 5/8" od and 30 thou thick. I wll be upgrading this clutch to the later C5/1 when it goes back together. Simon [ATTACH]25606[/ATTACH][ATTACH]25607[/ATTACH][ATTACH]25608[/ATTACH][ATTACH]25609[/ATTACH][ATTACH]25610[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Early Twin Clutch
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