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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Box Again
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<blockquote data-quote="chankly bore" data-source="post: 113826" data-attributes="member: 317"><p>If you are getting all gears then the selector shaft is probably correctly aligned, (9 o'clock with gearbox vertical). All meshing gears add up to 54 teeth, so layshaft from kickstart end is 24 teeth, 34, sliding dog, 28 and 21 teeth. Note that the splines for the last mentioned 21 tooth gear are wider than the other end of the shaft. The sliding dog cannot mesh any other way because the fit of everything is determined by the 33 tooth output gear which is fitted first. Snatchy drive can also be caused by the outer clutch plate lifting beyond the drum slots. You may be able to cure this by fitting a thicker plain plate outermost, or fitting one less pair of plates until they bed in a bit. The spring pressure on the selector pawl is not critical.</p></blockquote><p></p>
[QUOTE="chankly bore, post: 113826, member: 317"] If you are getting all gears then the selector shaft is probably correctly aligned, (9 o'clock with gearbox vertical). All meshing gears add up to 54 teeth, so layshaft from kickstart end is 24 teeth, 34, sliding dog, 28 and 21 teeth. Note that the splines for the last mentioned 21 tooth gear are wider than the other end of the shaft. The sliding dog cannot mesh any other way because the fit of everything is determined by the 33 tooth output gear which is fitted first. Snatchy drive can also be caused by the outer clutch plate lifting beyond the drum slots. You may be able to cure this by fitting a thicker plain plate outermost, or fitting one less pair of plates until they bed in a bit. The spring pressure on the selector pawl is not critical. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Box Again
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