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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Big End Replacement
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<blockquote data-quote="Cyborg" data-source="post: 134740" data-attributes="member: 3426"><p>The drive side has already been pinned with a roller, so ok there. The shaft itself appears ok and bearings will still be a snug fit on the shaft. I chucked the drive side shaft in the lathe to make sure the shaft and flywheel were still straight after the explosion. Everything seems fine, but the timing side didn’t survive unscathed. I held the timing side in the lathe and it wobbled around. Normally I would have put it between centres, but one of the centres was completely knackered.... could have fixed it, but was easier just to press out the shaft, which was obviously bent. I installed the timing side flywheel on a 1” stub arbor and it appears to be straight. When the new shaft is installed, I can then put it between centres and confirm it’s ok. At this point, I don’t think I’ll bother installing a roller in the timing side shaft.... hopefully nothing arises that will change my opinion on that and I can achieve enough of an interference fit with the +.005 shaft. If it doesn’t go well, I’ll have a nice new +.003 bigend bearing assembly for sale.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 134740, member: 3426"] The drive side has already been pinned with a roller, so ok there. The shaft itself appears ok and bearings will still be a snug fit on the shaft. I chucked the drive side shaft in the lathe to make sure the shaft and flywheel were still straight after the explosion. Everything seems fine, but the timing side didn’t survive unscathed. I held the timing side in the lathe and it wobbled around. Normally I would have put it between centres, but one of the centres was completely knackered.... could have fixed it, but was easier just to press out the shaft, which was obviously bent. I installed the timing side flywheel on a 1” stub arbor and it appears to be straight. When the new shaft is installed, I can then put it between centres and confirm it’s ok. At this point, I don’t think I’ll bother installing a roller in the timing side shaft.... hopefully nothing arises that will change my opinion on that and I can achieve enough of an interference fit with the +.005 shaft. If it doesn’t go well, I’ll have a nice new +.003 bigend bearing assembly for sale. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Big End Replacement
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