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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Sealed or unsealed gearbox bearings
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<blockquote data-quote="greg brillus" data-source="post: 135319" data-attributes="member: 597"><p>No real problem using them, I generally leave the inner seal out so the bearing gets lube from the rotating parts.........They do not really stop oil passing through, better than nothing when used on the E 91 crank main bearing, but as is known, the width of the inner race is usually narrow and has less contact area for the sprocket inner face to bare on....... I use a hardened washer there to help. My guess is that sealed bearings are just more common now than the ones from years ago, just like the use of "O" rings now........You still need to make sure the bearings have the C3 clearance, using standard clearance bearings is risky, as they tend to run too tight, with their radial clearance taken up once the heated cases cool down. Always check to see the inner race spins freely after installation...........Cheers.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 135319, member: 597"] No real problem using them, I generally leave the inner seal out so the bearing gets lube from the rotating parts.........They do not really stop oil passing through, better than nothing when used on the E 91 crank main bearing, but as is known, the width of the inner race is usually narrow and has less contact area for the sprocket inner face to bare on....... I use a hardened washer there to help. My guess is that sealed bearings are just more common now than the ones from years ago, just like the use of "O" rings now........You still need to make sure the bearings have the C3 clearance, using standard clearance bearings is risky, as they tend to run too tight, with their radial clearance taken up once the heated cases cool down. Always check to see the inner race spins freely after installation...........Cheers. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Sealed or unsealed gearbox bearings
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