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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Series "A" drive side ball bearing and engine build.
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<blockquote data-quote="A_HRD" data-source="post: 92449" data-attributes="member: 49"><p>Greg,</p><p></p><p>My take on this relates to the expansion and contraction of the cases in an axial direction. Yes the timing side shaft is fixed, but there will need to be some give at the d/s outer main bearing to account for the expansion/contraction movement. It will try to press itself against the "tin-hat cover". If the sprocket boss, once tight, can arrest this movement to prevent the bearing pressing against the tin hat then that would be advantageous. After all, Phil put the spring there for a reason, a solid spacer might be a recipe for disaster. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /></p><p>Peter B</p></blockquote><p></p>
[QUOTE="A_HRD, post: 92449, member: 49"] Greg, My take on this relates to the expansion and contraction of the cases in an axial direction. Yes the timing side shaft is fixed, but there will need to be some give at the d/s outer main bearing to account for the expansion/contraction movement. It will try to press itself against the "tin-hat cover". If the sprocket boss, once tight, can arrest this movement to prevent the bearing pressing against the tin hat then that would be advantageous. After all, Phil put the spring there for a reason, a solid spacer might be a recipe for disaster. :eek: Peter B [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Series "A" drive side ball bearing and engine build.
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