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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox advice needed.
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<blockquote data-quote="timetraveller" data-source="post: 138327" data-attributes="member: 456"><p>First of all. many thanks to all who offered advice. I spent the afternoon helping Jason to take things apart. In the end we took out the gearbox having had to remove the return oil feed line, the battery carrier and lower the exhaust pipe and silencer. The problem was as diagnosed by several of you. The inner splines of the final drive sprocket had dissapeared, totally so top marks to those of you who predicted this would be the case. The part of the main shaft on which this is located has a male sprocket and the teeth on that, although present, have wear at their ends where the final drive sprocket has chattered. Why this should become evident at the same time as the cluch cable broke is one of those things that probably require a belief in wichcraft rather than science. We have dismantled the whole gearbox and I left Jason cleaning all the parts in petrol so that we can inspect them tomorrow. Most seem to be in good order but at least one pinion has two adjacent teeth malformed at their very ends as though something has gone through them at some time in the last seventy years.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 138327, member: 456"] First of all. many thanks to all who offered advice. I spent the afternoon helping Jason to take things apart. In the end we took out the gearbox having had to remove the return oil feed line, the battery carrier and lower the exhaust pipe and silencer. The problem was as diagnosed by several of you. The inner splines of the final drive sprocket had dissapeared, totally so top marks to those of you who predicted this would be the case. The part of the main shaft on which this is located has a male sprocket and the teeth on that, although present, have wear at their ends where the final drive sprocket has chattered. Why this should become evident at the same time as the cluch cable broke is one of those things that probably require a belief in wichcraft rather than science. We have dismantled the whole gearbox and I left Jason cleaning all the parts in petrol so that we can inspect them tomorrow. Most seem to be in good order but at least one pinion has two adjacent teeth malformed at their very ends as though something has gone through them at some time in the last seventy years. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox advice needed.
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