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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oval Slots
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<blockquote data-quote="oexing" data-source="post: 177066" data-attributes="member: 1493"><p>Thanks for the photos, I see not a lot of meat around some holes. Even thin-walled hollow dowels with 1 mm wall thickness bear a lot of side loads so maybe I´d try the bigger hole at 10 o´clock position looking at the ball bearing place and go for 3/8 or 10mm size, for a 8mm stud. Same for the long bolt at bottom- with a slotted screw in it ?? Maybe make a stepped bolt there with 6mm outer half, well, 1/4 is allright. So a hollow dowel would do easily. For finding the correct place of the oval hole a mill would be good and a center finding clock. So then the corresponding gearbox part can be the datum for placing the worn cover over it and bore the holes for accepting the dowels. Most of time simple screws would do for gearbox covers but when a kickstart shaft is inside with bushes there is substantial side load from this and dowels would be the way to do a good job. </p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 177066, member: 1493"] Thanks for the photos, I see not a lot of meat around some holes. Even thin-walled hollow dowels with 1 mm wall thickness bear a lot of side loads so maybe I´d try the bigger hole at 10 o´clock position looking at the ball bearing place and go for 3/8 or 10mm size, for a 8mm stud. Same for the long bolt at bottom- with a slotted screw in it ?? Maybe make a stepped bolt there with 6mm outer half, well, 1/4 is allright. So a hollow dowel would do easily. For finding the correct place of the oval hole a mill would be good and a center finding clock. So then the corresponding gearbox part can be the datum for placing the worn cover over it and bore the holes for accepting the dowels. Most of time simple screws would do for gearbox covers but when a kickstart shaft is inside with bushes there is substantial side load from this and dowels would be the way to do a good job. Vic [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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