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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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<blockquote data-quote="Matty" data-source="post: 28869" data-attributes="member: 1339"><p>Just done a double check on the engagement of 4th gear dogs using Vic's damaged parts in the "new" casing and I have confirmed that with all the slop on the selectors in the worst direction, his 4th gears engage by 3.5mm which is a little beyond the worn, tapered bits of the dogs and should be OK.</p><p></p><p>This is with the selector shaft "bottomed" at the drive gear end. So if there was little or no end float on Vic's selector shaft, there should not have been a problem.</p><p></p><p>However maybe the selector shaft bush face is worn on my "new" casing and hence the shaft further in than on the casings you have tested, so giving me more engagement depth.</p><p></p><p>Maybe the flange on this bush was a bit thicker in your boxes, which would result in poorer 4th gear engagement. </p><p></p><p>However I'm sure the various fixes which have been discussed to these tolerance/wear problems should get us Burman gearboxes which will hopefully last another 60 years or so !!!</p><p></p><p>Matty</p></blockquote><p></p>
[QUOTE="Matty, post: 28869, member: 1339"] Just done a double check on the engagement of 4th gear dogs using Vic's damaged parts in the "new" casing and I have confirmed that with all the slop on the selectors in the worst direction, his 4th gears engage by 3.5mm which is a little beyond the worn, tapered bits of the dogs and should be OK. This is with the selector shaft "bottomed" at the drive gear end. So if there was little or no end float on Vic's selector shaft, there should not have been a problem. However maybe the selector shaft bush face is worn on my "new" casing and hence the shaft further in than on the casings you have tested, so giving me more engagement depth. Maybe the flange on this bush was a bit thicker in your boxes, which would result in poorer 4th gear engagement. However I'm sure the various fixes which have been discussed to these tolerance/wear problems should get us Burman gearboxes which will hopefully last another 60 years or so !!! Matty [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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