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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Drive Side Bearing Setup Question Series ‘A’
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<blockquote data-quote="Simon Dinsdale" data-source="post: 107545" data-attributes="member: 58"><p>BigEd, Bill is asking about series A which is a completely different design with a spring between the two bearings on the drive side main shaft. </p><p></p><p>Bill, my understanding is on series A the crank is secured / located on the timing side and everything floats on the primary side. The spring is there to ensure the outer drive side bearing is pushed tight against the outer shims and shields to ensure the small clearance determined by the shims is maintained. With no spring the outer bearing could move and the shim and shield clearance alter and so could cause the primary to fill up with engine oil. The purpose off all those shims and shields on the drive side is to form a sort of oil seal between the engine and the primary.</p><p></p><p>Simon</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 107545, member: 58"] BigEd, Bill is asking about series A which is a completely different design with a spring between the two bearings on the drive side main shaft. Bill, my understanding is on series A the crank is secured / located on the timing side and everything floats on the primary side. The spring is there to ensure the outer drive side bearing is pushed tight against the outer shims and shields to ensure the small clearance determined by the shims is maintained. With no spring the outer bearing could move and the shim and shield clearance alter and so could cause the primary to fill up with engine oil. The purpose off all those shims and shields on the drive side is to form a sort of oil seal between the engine and the primary. Simon [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Drive Side Bearing Setup Question Series ‘A’
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