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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox Leak
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<blockquote data-quote="Martyn Goodwin" data-source="post: 47405" data-attributes="member: 2433"><p>I continue on my journey to restore my Comet to (hopefully) pristine condition.</p><p></p><p>Some while back I rebuilt the Burman gearbox, replacing all the bearing, bushes and all of the spring box components. I am running it with Penrite Semi-Liquid grease but am plagued with a oil (or should that be grease) leak from around the gear-change lever shaft. After every run there is a generous smudge of grease on the gearbox cover with some making its way onto - and thus staining - the exhaust.</p><p></p><p>I now am in the habit of carrying an old rag and every time I stop its a quick wipe of the gearbox cover to try keeping the grease under control.</p><p></p><p>For what its worth I have installed a felt washer (home made) between the gearbox case and the gear change lever [as I have also done with the kick start lever]. Also I have put a 1/16" vent hole in the gearbox cover cap - the bit that goes over the clutch lever - in an attempt to relieve any internal pressure - but all to no avail; however there are no leaks from around the kick starter or from the new breather hole.</p><p></p><p>Question - is my experience common? And - what can be done to try to eliminate the grease weep from the gear change shaft?</p><p></p><p>Martyn</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 47405, member: 2433"] I continue on my journey to restore my Comet to (hopefully) pristine condition. Some while back I rebuilt the Burman gearbox, replacing all the bearing, bushes and all of the spring box components. I am running it with Penrite Semi-Liquid grease but am plagued with a oil (or should that be grease) leak from around the gear-change lever shaft. After every run there is a generous smudge of grease on the gearbox cover with some making its way onto - and thus staining - the exhaust. I now am in the habit of carrying an old rag and every time I stop its a quick wipe of the gearbox cover to try keeping the grease under control. For what its worth I have installed a felt washer (home made) between the gearbox case and the gear change lever [as I have also done with the kick start lever]. Also I have put a 1/16" vent hole in the gearbox cover cap - the bit that goes over the clutch lever - in an attempt to relieve any internal pressure - but all to no avail; however there are no leaks from around the kick starter or from the new breather hole. Question - is my experience common? And - what can be done to try to eliminate the grease weep from the gear change shaft? Martyn [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Gearbox Leak
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