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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: 29238" data-attributes="member: 1339"><p>PS</p><p></p><p>I have checked the amount of engagement with just the output gear, 4th gear sliding dog gear and selector assembly in the box. I put the selector into 4th, pushed the selector shaft fully in to its bearing and then pulled the 4th gear dog assembly as far back as it would go to make a worst case scenario. Then I used a course felt tipped pen to mark the 4th gear dog on a few teeth where it went into the output gear so that I could see the depth of engagement. It looked like nearly 4mm - and I am sure the pen went right into the corners.</p><p></p><p>Trying the same thing with Vics damaged parts produced a simular result, but of course the dogs on these gears are very worn and tapered so the contact area is much less.</p><p></p><p>The 4th gear dogs on my old box gears look virtually unworn, with just a slight taper for a lead in - perhaps I am just a very sympathetic gear changer - but where is the missing 2mm or so ? !!!!</p><p></p><p> </p><p>Matty</p></blockquote><p></p>
[QUOTE="Matty, post: 29238, member: 1339"] PS I have checked the amount of engagement with just the output gear, 4th gear sliding dog gear and selector assembly in the box. I put the selector into 4th, pushed the selector shaft fully in to its bearing and then pulled the 4th gear dog assembly as far back as it would go to make a worst case scenario. Then I used a course felt tipped pen to mark the 4th gear dog on a few teeth where it went into the output gear so that I could see the depth of engagement. It looked like nearly 4mm - and I am sure the pen went right into the corners. Trying the same thing with Vics damaged parts produced a simular result, but of course the dogs on these gears are very worn and tapered so the contact area is much less. The 4th gear dogs on my old box gears look virtually unworn, with just a slight taper for a lead in - perhaps I am just a very sympathetic gear changer - but where is the missing 2mm 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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