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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="Simon Dinsdale" data-source="post: 92454" data-attributes="member: 58"><p>Its a few years ago, but I seem to remember when my Dad and I assembled my series A Comet, with all the bearings, shims, chip guards etc in place, the outer driveside ball bearing was pushed tight up against the outer bearing cap (tin hat). When the sprocket was tightened up you could feel it pushing against the spring between the bearings so the spring is there to allow the crank to float in this area, but also to keep pressure on the outer chip guard & washer/spacers so they all rotate and move as one and have no independent play. Bob Stafford once said that if there is too much clearance in the chip guard/shim/spacer area on the outer bearing then the primary chaincase will slowly fill up with engine oil. A sealed bearing would help with that.</p><p></p><p>Simon</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 92454, member: 58"] Its a few years ago, but I seem to remember when my Dad and I assembled my series A Comet, with all the bearings, shims, chip guards etc in place, the outer driveside ball bearing was pushed tight up against the outer bearing cap (tin hat). When the sprocket was tightened up you could feel it pushing against the spring between the bearings so the spring is there to allow the crank to float in this area, but also to keep pressure on the outer chip guard & washer/spacers so they all rotate and move as one and have no independent play. Bob Stafford once said that if there is too much clearance in the chip guard/shim/spacer area on the outer bearing then the primary chaincase will slowly fill up with engine oil. A sealed bearing would help with that. Simon [/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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