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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: 30209" data-attributes="member: 1339"><p>Hi </p><p>Mine was better than this at about 3mm, but I put a 1mm hard shim spacer washer behind the output gear to move it in a little. 1mm still allows about 1mm clearance from the bronze selector or layshaft gear.</p><p>This was quite a narrow spacer washer (only about 3mm), because otherwise it will scrape on the inside of the aluminium flange behind the beariing if the spacer has too great an outside diameter.</p><p></p><p>I also removed as much end float on the selector shaft as possible, by moving the shaft roller bearing at the gearchange end in to take up any end play. You could put a suitable spacer behind the selector shaft roller bearing flange for this, but my bearing was very tight even after heating and I just moved it in a few thou to avoid damage bashing it.</p><p></p><p>My gearbox now works very well and I have done about 500 miles with it since Christmas.</p><p></p><p>Good Luck</p><p></p><p>Matty</p></blockquote><p></p>
[QUOTE="Matty, post: 30209, member: 1339"] Hi Mine was better than this at about 3mm, but I put a 1mm hard shim spacer washer behind the output gear to move it in a little. 1mm still allows about 1mm clearance from the bronze selector or layshaft gear. This was quite a narrow spacer washer (only about 3mm), because otherwise it will scrape on the inside of the aluminium flange behind the beariing if the spacer has too great an outside diameter. I also removed as much end float on the selector shaft as possible, by moving the shaft roller bearing at the gearchange end in to take up any end play. You could put a suitable spacer behind the selector shaft roller bearing flange for this, but my bearing was very tight even after heating and I just moved it in a few thou to avoid damage bashing it. My gearbox now works very well and I have done about 500 miles with it since Christmas. Good Luck Matty [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman 4th Gear Selector Meltdown
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