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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Clutch Suggestions…
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<blockquote data-quote="timetraveller" data-source="post: 166438" data-attributes="member: 456"><p>Well at some stage in the past it has had an enthusiastic owner. Not only two front head and TT carbs but also a lightened clutch drum. The earlier lightened clutch drums made by the works had 'half holes', were prone to failure and were used up on Rapides. Your bike does not have the 'half holes' (i.e. semi-circular holes round the outer edge of the back of the drum) so the holes in yours were probably made at the same time as the other sporting mods. A new replacement drum will not have the same holes as yours. The linings on the clutch shoes look to be in good order so no need to replace those. So it looks as though all you need are a new drum, a new friction plate and my suggestion when putting it all back together is to do a small mod to the rear of the tube of the shoe carrier to take an 'o' ring seal (If you do this you do not need to use sealing compound on the splines) and fit a needle roller thrust race conversion in the centre of the outer plate. The latter is available from me or the Spares Company and is listed on line as C26 mod.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 166438, member: 456"] Well at some stage in the past it has had an enthusiastic owner. Not only two front head and TT carbs but also a lightened clutch drum. The earlier lightened clutch drums made by the works had 'half holes', were prone to failure and were used up on Rapides. Your bike does not have the 'half holes' (i.e. semi-circular holes round the outer edge of the back of the drum) so the holes in yours were probably made at the same time as the other sporting mods. A new replacement drum will not have the same holes as yours. The linings on the clutch shoes look to be in good order so no need to replace those. So it looks as though all you need are a new drum, a new friction plate and my suggestion when putting it all back together is to do a small mod to the rear of the tube of the shoe carrier to take an 'o' ring seal (If you do this you do not need to use sealing compound on the splines) and fit a needle roller thrust race conversion in the centre of the outer plate. The latter is available from me or the Spares Company and is listed on line as C26 mod. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Clutch Suggestions…
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