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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
New Gearbox: Help Needed
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<blockquote data-quote="BigEd" data-source="post: 106154" data-attributes="member: 161"><p>The G6/1 can improve the gear change but due to the mix/match of components, they need some tweaking to have an effect. The standard G6/1 is quite flimsy. I made my own with two nuts for adjustment and some bracing to stop the nuts being bent backwards. A problem with this mod is that there is not much space here and the nut closest to the timing cover is fouled by the kick start mechanism. I have space as I have an electric start and the kick start mechanism removed.</p><p>This mod is only a partial solution as the G61/1 only limits the movement of the G59/AS. The rest of the mechanism inboard can carry on turning due to the momentum of the camplate etc. This is probably not so much of a factor for normal gear changing but more of a problem when going for a fast change or people who are used to stamping through the gears on more modern gear boxes..</p><p>Phil Irving proposed a fix by welding and filing to make a revised G43 that acts like more of a gear to keep it locked to the corresponding part on the G59/AS and so preventing the G40 shaft continuing to turn due to momentum. This is easier to understand with an M003 parts drawing to hand.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> I think you may find it described fully in 40 Years On. I have not tried this yet, maybe sometime.</p></blockquote><p></p>
[QUOTE="BigEd, post: 106154, member: 161"] The G6/1 can improve the gear change but due to the mix/match of components, they need some tweaking to have an effect. The standard G6/1 is quite flimsy. I made my own with two nuts for adjustment and some bracing to stop the nuts being bent backwards. A problem with this mod is that there is not much space here and the nut closest to the timing cover is fouled by the kick start mechanism. I have space as I have an electric start and the kick start mechanism removed. This mod is only a partial solution as the G61/1 only limits the movement of the G59/AS. The rest of the mechanism inboard can carry on turning due to the momentum of the camplate etc. This is probably not so much of a factor for normal gear changing but more of a problem when going for a fast change or people who are used to stamping through the gears on more modern gear boxes.. Phil Irving proposed a fix by welding and filing to make a revised G43 that acts like more of a gear to keep it locked to the corresponding part on the G59/AS and so preventing the G40 shaft continuing to turn due to momentum. This is easier to understand with an M003 parts drawing to hand.;) I think you may find it described fully in 40 Years On. I have not tried this yet, maybe sometime. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
New Gearbox: Help Needed
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