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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: 28194" data-attributes="member: 1339"><p>Thanks tatty500 for the information.</p><p></p><p> Believe I have found another old Burman casing with a good bearing housing to replace mine, which when I get it and the damaged gears etc. I will use to see if I can in any way improve the depth of entry of the sliding dog into the output gear.</p><p></p><p>I understand the problem with the small size of the 1mm spacer but think 3mm wall size should be strong enough, provided the sprocket securing nut is really tight.</p><p></p><p> Presumably this 3mm wall size is determined by the distance from the mainshaft to the flange on the aluminium casting. However, if necessary is there any reason why the flange internal diameter could not be increased (filed out) to accomodate a larger outside diameter spacer?</p><p></p><p>Without having the bits available yet to look at - is there any reason why a thicker spacer could not be used (say 2mm) with perhaps a taper ground onto the teeth of the output gear or a bit ground off the shoulder of the camshaft to give more clearance?</p><p></p><p>Am I perhaps thinking too laterally?</p><p></p><p>Matty</p></blockquote><p></p>
[QUOTE="Matty, post: 28194, member: 1339"] Thanks tatty500 for the information. Believe I have found another old Burman casing with a good bearing housing to replace mine, which when I get it and the damaged gears etc. I will use to see if I can in any way improve the depth of entry of the sliding dog into the output gear. I understand the problem with the small size of the 1mm spacer but think 3mm wall size should be strong enough, provided the sprocket securing nut is really tight. Presumably this 3mm wall size is determined by the distance from the mainshaft to the flange on the aluminium casting. However, if necessary is there any reason why the flange internal diameter could not be increased (filed out) to accomodate a larger outside diameter spacer? Without having the bits available yet to look at - is there any reason why a thicker spacer could not be used (say 2mm) with perhaps a taper ground onto the teeth of the output gear or a bit ground off the shoulder of the camshaft to give more clearance? Am I perhaps thinking too laterally? Matty [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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