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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Clutch
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<blockquote data-quote="Martyn Goodwin" data-source="post: 32788" data-attributes="member: 2433"><p>FWIW I stripped down the clutch (Burman) on my Comet to try to resolve the mongrel intermittent sticking clutch- crashing gears issue I was plagued with.</p><p></p><p>Having removed all of the clutch components from the bike - that lock washer in the clutch centre is a Orwellian nightmare - I was able to inspect it with some care.</p><p></p><p>What I found was that the slots in the clutch drum had developed distinct "valleys" where the fingers of the friction plates bore on it. On the central drum, I found simmilar valleys in the splines that engage with the pressure plates. It is no wonder that these plates were reluctant to move or separate when I attempted to engage the clutch.</p><p></p><p>With a suitable fine tooth file I have removed the valleys - I guess what I really did was flatten the mountain peaks.</p><p></p><p>Reassembly of the clutch has been completed but road testing will be a week of so away as I am also working on the global warming oil consumption issue I have and as a consequence, I have the top end of the motor currently spread across my workshop.</p><p></p><p>Martyn</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 32788, member: 2433"] FWIW I stripped down the clutch (Burman) on my Comet to try to resolve the mongrel intermittent sticking clutch- crashing gears issue I was plagued with. Having removed all of the clutch components from the bike - that lock washer in the clutch centre is a Orwellian nightmare - I was able to inspect it with some care. What I found was that the slots in the clutch drum had developed distinct "valleys" where the fingers of the friction plates bore on it. On the central drum, I found simmilar valleys in the splines that engage with the pressure plates. It is no wonder that these plates were reluctant to move or separate when I attempted to engage the clutch. With a suitable fine tooth file I have removed the valleys - I guess what I really did was flatten the mountain peaks. Reassembly of the clutch has been completed but road testing will be a week of so away as I am also working on the global warming oil consumption issue I have and as a consequence, I have the top end of the motor currently spread across my workshop. Martyn [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Clutch
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