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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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<blockquote data-quote="brian gains" data-source="post: 111159" data-attributes="member: 3153"><p>having removed the final drive sprocket the retaining circlip was unseated this quite likely will have allowed the bearing to walk with corresponding axial movement in the final drive gear. fortunately the gear box housing for the bearing has not wallowed out and the bearing seems a tight fit. however, part of the outer lip of the gear box circlip groove fell away which is obviously allowing the circlip to become unseated.</p><p>I can't understand this type of failure other than by ham fisted dismantling applying unnecessary heavy axial load via the main shaft and resultant knock on effect. in mitigation I can say I had not been into the gearbox prior to 4th gear not engaging. Anyhoos, long wait envisaged as welder and machinist coordinate works.</p><p>" 'tis business of the wealthy man to give work to the artisan" , only problem with that adage is I ain't rich.</p><p>thoughts on using an angular bearing on the out put gear ?</p><p>yes, i also had great success with the Brightspark condenser replacemnt on a BSA at the fraction of the price of a mag' condenser replacement and rebuild. Totally recommend it.</p></blockquote><p></p>
[QUOTE="brian gains, post: 111159, member: 3153"] having removed the final drive sprocket the retaining circlip was unseated this quite likely will have allowed the bearing to walk with corresponding axial movement in the final drive gear. fortunately the gear box housing for the bearing has not wallowed out and the bearing seems a tight fit. however, part of the outer lip of the gear box circlip groove fell away which is obviously allowing the circlip to become unseated. I can't understand this type of failure other than by ham fisted dismantling applying unnecessary heavy axial load via the main shaft and resultant knock on effect. in mitigation I can say I had not been into the gearbox prior to 4th gear not engaging. Anyhoos, long wait envisaged as welder and machinist coordinate works. " 'tis business of the wealthy man to give work to the artisan" , only problem with that adage is I ain't rich. thoughts on using an angular bearing on the out put gear ? yes, i also had great success with the Brightspark condenser replacemnt on a BSA at the fraction of the price of a mag' condenser replacement and rebuild. Totally recommend it. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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